CN-122018032-A - Volcanic rock facies logging identification method and device

CN122018032ACN 122018032 ACN122018032 ACN 122018032ACN-122018032-A

Abstract

The invention relates to the technical field of oil and gas exploration and development, and particularly discloses a volcanic rock facies logging identification method and device. The volcanic rock facies logging identification method comprises the steps of obtaining multiple groups of volcanic rock sample data in a target area, wherein the volcanic rock sample data comprise logging data of volcanic rock samples and corresponding lithofacies types, constructing a volcanic rock facies logging identification mode plate in the target area based on the multiple groups of volcanic rock sample data, and carrying out lithofacies identification on the volcanic rock samples in the target area based on the volcanic rock facies logging identification mode plate in the target area. According to the scheme, the volcanic rock facies logging identification mode plate is established by utilizing the advantages of continuous logging curves, multiple information and capability of reflecting volcanic rock lithology, and the volcanic rock facies can be identified simply, quickly and accurately by utilizing the volcanic rock facies logging identification mode plate.

Inventors

LIU GAOHUA
ZHANG XINHUI
MA ZHENBANG
SI YONG
LI TIESHUAN
LIN JIA
JIANG GUANG
ZHAO HUI
LIU JIANXIN
WANG XIANZHENG
JING YUE

Assignees

中国石油天然气股份有限公司

Dates

Publication Date: 20260512
Application Date: 20241112

Claims (20)

1. The volcanic rock facies logging identification method is characterized by comprising the following steps of: Acquiring a plurality of groups of volcanic rock sample data in a target area, wherein the volcanic rock sample data comprise logging data of volcanic rock samples and corresponding lithofacies types; based on the obtained multiple groups of volcanic rock sample data, constructing a volcanic rock facies logging identification mode plate in the target area; and carrying out lithofacies identification on the volcanic rock sample in the target area based on the volcanic rock facies logging identification mode plate in the target area.
2. The method of claim 1, wherein the log data of the volcanic sample comprises natural gamma, density, compensated neutrons, acoustic moveout, and resistivity.
3. The method of volcanic lithofacies logging identification of claim 1, wherein obtaining a plurality of sets of volcanic sample data within a target area comprises: analyzing the lithofacies type of volcanic rock in the target area; and acquiring a plurality of groups of volcanic rock sample data aiming at each lithofacies type.
4. The method of claim 3, wherein analyzing the lithofacies type of the volcanic rock in the target area comprises analyzing the lithofacies type of the volcanic rock in the target area based on the geological features and the petrophysical features of the target area from actual geological data of the target area.
5. The method of claim 4, wherein the geological features of the target area include a background of geological formations, a history of volcanic activity, and associated depositional environments of the target area, and the petrophysical features include rock composition, structural configuration, and rock type.
6. The method of claim 3, wherein constructing a volcanic rock facies logging identification pattern plate in the target area based on the acquired plurality of sets of volcanic rock sample data comprises: preprocessing a plurality of groups of volcanic rock sample data of the acquired lithofacies types; and constructing a volcanic rock facies logging identification mode plate for representing the association between each volcanic rock facies type and logging data in the target area based on the preprocessed multiple groups of volcanic rock sample data.
7. The method of volcanic rock facies logging identification of claim 6, wherein preprocessing the acquired plurality of sets of volcanic rock sample data for a plurality of lithofacies types comprises: Sequencing a plurality of groups of volcanic rock sample data of the acquired multiple lithofacies types according to the lithofacies types; sequentially numbering the ordered multiple groups of volcanic sample data to obtain the preprocessed multiple groups of volcanic sample data.
8. The method of claim 7, wherein constructing a volcanic rock facies logging identification pattern template characterizing correlations between individual volcanic rock facies types and logging data in a target area based on the preprocessed sets of volcanic rock sample data, comprises: constructing a volcanic rock facies logging identification flower-like diagram based on the preprocessed multiple groups of volcanic rock sample data, wherein in the volcanic rock facies logging identification flower-like diagram, radial coordinates represent logging data size, and angular coordinates represent sample data numbers; And drawing a dividing line between two adjacent lithofacies types in the volcanic lithofacies logging identification flower-shaped graph so as to divide the volcanic lithofacies logging identification flower-shaped graph into a plurality of fan-shaped petals, wherein each fan-shaped petal represents one lithofacies type, and thus the volcanic lithofacies logging identification pattern graph is formed.
9. The method of claim 8, wherein performing facies identification on the volcanic sample in the target area based on the volcanic facies logging identification pattern plate in the target area comprises: Acquiring logging data of a volcanic rock sample in a target area; And projecting the obtained logging data of the volcanic rock sample into the volcanic rock facies logging identification mode plate, and determining the rock facies of the volcanic rock sample by checking which sector petals the logging data fall into.
10. The method of volcanic rock facies logging identification of claim 3, wherein obtaining a plurality of sets of volcanic rock sample data in a target area comprises: analyzing the sub-phase type of each lithofacies type; for each subphase type, multiple sets of volcanic sample data are obtained.
11. The method of claim 10, wherein constructing a volcanic lithofacies logging identification pattern template in the target area based on the acquired plurality of sets of volcanic sample data, comprises: preprocessing the obtained multiple groups of volcanic rock sample data of multiple sub-phase types; And constructing a volcanic subsurface logging identification pattern plate for representing the association between each volcanic subsurface type in the target area and logging data based on the preprocessed multiple groups of volcanic sample data.
12. The method of volcanic rock facies logging identification of claim 11, wherein preprocessing the acquired plurality of sets of volcanic rock sample data for a plurality of sub-facies types comprises: Sequencing a plurality of groups of volcanic rock sample data of the acquired sub-phase types according to the rock phase types; Sequencing a plurality of groups of volcanic rock sample data of each lithofacies type according to the sub-facies type; sequentially numbering the ordered multiple groups of volcanic sample data to obtain the preprocessed multiple groups of volcanic sample data.
13. The method of volcanic lithofacies logging identification of claim 12, wherein constructing volcanic sub-facies logging identification pattern templates characterizing correlations between respective volcanic sub-facies types and logging data within a target area based on the preprocessed sets of volcanic sample data comprises: Constructing a volcanic subphase logging identification flower-like diagram based on a plurality of groups of preprocessed volcanic sample data, wherein in the volcanic subphase logging identification flower-like diagram, radial coordinates represent logging data size, and angular coordinates represent sample data numbers; and drawing a dividing line between two adjacent lithofacies types in the volcanic sub-phase logging identification flower-like graph to divide the volcanic lithofacies logging identification flower-like graph into a plurality of sector petals, wherein each sector petal represents one lithofacies type, and drawing a dividing line between two adjacent sub-phase types in each lithofacies type to divide each sector petal into sub-sector petals, and each sub-sector petal represents one sub-phase type, thereby forming the volcanic sub-phase logging identification pattern graph.
14. The method of claim 13, wherein performing facies identification on the volcanic sample in the target area based on the volcanic facies logging identification pattern plate in the target area comprises: Acquiring logging data of a volcanic rock sample in a target area; The obtained logging data of the volcanic rock sample is projected into the volcanic rock subphase logging identification mode plate, and the lithology and/or subphase of the volcanic rock sample is determined by checking which fan-shaped petals and/or which sub-fan-shaped petals the logging data falls into.
15. A method of identifying volcanic lithofacies logging as claimed in claim 3 wherein the lithofacies types of volcanic rock include burst phase, overflow phase, invasion phase, volcanic sediment phase.
16. The method of claim 10, wherein the lithofacies types of the volcanic rock include an outbreak phase, an overflow phase, an invasion phase, and a volcanic sediment phase, the outbreak phase including a volcanic clastic flow subphase, the overflow phase including a composite lava flow subphase, a vitreous clastic rock subphase, and a platy lava flow subphase, the invasion phase including an outer band subphase, a middle band subphase, and an inner band subphase, the volcanic sediment phase including an outer clastic rock-containing volcanic sediment subphase, and a re-handling volcanic clastic sediment subphase.
17. A volcanic lithofacies logging identification device, comprising: the sample data acquisition module is used for acquiring a plurality of groups of volcanic rock sample data in the target area, wherein the volcanic rock sample data comprise logging data of volcanic rock samples and corresponding lithofacies types; The template construction module is used for constructing a volcanic rock facies logging identification mode template in the target area based on the acquired multiple groups of volcanic rock sample data; and the lithofacies identification module is used for carrying out lithofacies identification on the volcanic rock sample in the target area based on the volcanic rock facies logging identification mode plate in the target area.
18. The volcanic rock facies logging identification device of claim 17, wherein the plate construction module comprises a facies identification plate construction sub-module for constructing volcanic rock facies logging identification pattern plates characterizing correlations between respective volcanic rock facies types and logging data within the target area based on the acquired sets of volcanic rock sample data.
19. The volcanic lithofacies logging identification device of claim 17, wherein the pattern construction module comprises a sub-phase identification pattern construction sub-module for constructing volcanic sub-phase logging identification pattern patterns characterizing correlations between respective volcanic sub-phase types and logging data within a target area based on the acquired sets of volcanic sample data.
20. The volcanic lithofacies logging identification device of claim 17, wherein the logging data of the volcanic sample comprises natural gamma, density, compensated neutrons, acoustic moveout, and resistivity.

Description

Volcanic rock facies logging identification method and device Technical Field The invention relates to the technical field of oil and gas exploration and development, in particular to a volcanic rock facies logging identification method and a volcanic rock facies logging identification device. Background Volcanic rock refers to the hills with different shapes, which are piled up by the ground after the hot gas, liquid and solid sprayed out of the ground from the volcanic explosion, and the gas slag and the solid magma exist in the magma sprayed out during the explosion, so that the temperature and the pressure are rapidly reduced, and chemical change and physical change occur, so the magma becomes volcanic rock. The rock formed by condensing the magma from the earth deep hot sprayed to the earth surface through the volcanic orifice is divided into volcanic rock in a narrow sense and volcanic rock in a broad sense. Volcanic rock in the narrow sense refers to volcanic lava, which is a low-viscosity and low-volatile magma (such as basic magma) overflows from a volcanic orifice in a melt form, and a high-viscosity acidic magma is in the late stage of volcanic eruption, and the volcanic lava can be formed because volatile matters in a magma room largely escape and then invade the ground surface. Volcanic in a broad sense includes volcanic clastic in addition to lava. Volcaniclastic rock is mainly formed by the explosive eruption of some high viscosity, high volatile content acid rock to the surface, often mixed with some amount of normal sediment or lava material. The volcanic rock facies mainly refer to the output environment and the lithofacies characteristics of volcanic activity products, and the analysis of the volcanic rock facies is an important problem in researching the deposition environment, searching hidden oil reservoirs and evaluating oil gas. The prior volcanic rock facies identification method mainly judges the volcanic rock facies by analyzing drilling coring and rock chip logging data, and the method has high cost and low time efficiency, and is difficult to completely describe the stratum core of each well section due to fewer coring wells, fewer continuous coring and inaccurate rock chip logging. Disclosure of Invention In view of the above, the invention provides a volcanic rock facies logging identification method and device, which aims to establish a volcanic rock facies logging identification mode plate for volcanic rock facies identification by utilizing the advantages of continuous logging curves, multiple information and capability of reflecting volcanic rock lithology. In order to achieve the above purpose, the present invention adopts the following technical scheme: According to a first aspect of the present invention there is provided a volcanic rock facies logging identification method comprising the steps of: Acquiring a plurality of groups of volcanic rock sample data in a target area, wherein the volcanic rock sample data comprise logging data of volcanic rock samples and corresponding lithofacies types; based on the obtained multiple groups of volcanic rock sample data, constructing a volcanic rock facies logging identification mode plate in the target area; and carrying out lithofacies identification on the volcanic rock sample in the target area based on the volcanic rock facies logging identification mode plate in the target area. According to one embodiment of the invention, the log data of the volcanic sample includes natural gamma, density, compensated neutrons, acoustic moveout and resistivity. According to one embodiment of the present invention, acquiring multiple sets of volcanic sample data within a target area includes: analyzing the lithofacies type of volcanic rock in the target area; and acquiring a plurality of groups of volcanic rock sample data aiming at each lithofacies type. According to one embodiment of the invention, analyzing the lithology type of the volcanic rock in the target area comprises analyzing the lithology type of the volcanic rock in the target area according to the geological features and the lithology features of the target area from the actual geological data of the target area. According to one embodiment of the invention, the geological features of the target region include the geological background of the target region, the volcanic activity history, and the associated depositional environment, and the petrophysical features include rock composition, structural configuration, and rock type. According to one embodiment of the invention, based on the acquired multiple sets of volcanic sample data, a volcanic rock facies logging identification pattern plate in a target area is constructed, comprising: preprocessing a plurality of groups of volcanic rock sample data of the acquired lithofacies types; and constructing a volcanic rock facies logging identification mode plate for representing the association between each volcanic rock facies t