CN-114779333-B - Method and system for determining the location of a hydrocarbon reservoir

CN114779333BCN 114779333 BCN114779333 BCN 114779333BCN-114779333-B

Abstract

The present invention relates to methods and systems for determining the location of a hydrocarbon reservoir using a model of mechanical properties of a subsurface geologic region. The method (10, 20) includes the steps of creating a plurality of hypothetical seismic profiles (11, 21) at the time of deposition based on a seismic interpretation of the subsurface geologic region and the effects of the formation time data and the formation pressure data, and creating a mechanical property model (12, 22) of the subsurface geologic region based on the plurality of hypothetical seismic profiles at the time of deposition and the effects of the formation time data and the formation pressure data.

Inventors

Abdulwahab Nufar
Khalid Obeid

Assignees

阿布扎比国家石油公司

Dates

Publication Date: 20260505
Application Date: 20211220
Priority Date: 20201221

Claims (7)

1.A method for determining a location of a hydrocarbon reservoir using a created model of mechanical properties of a subsurface geologic region, the method comprising the steps performed by a computer of: receiving gamma ray data, acoustic data, or measured density data measured in a log in the subsurface geological region; Deriving formation time data and formation pressure data using the seismic interpretation of the subsurface geologic region and data from well log measurements; Generating a plurality of hypothetical seismic profiles at the time of the depositions based on the seismic interpretation of the subsurface geologic region and the derived formation time data and formation pressure data; Detecting boundaries in a plurality of hypothetical seismic profiles at the time of deposition using the received gamma ray data, acoustic data, or measured density data; Creating a mechanical property model of the subsurface geologic region based on the plurality of hypothetical seismic profiles at the time of the depositing, the derived formation time data and the formation pressure data, and the boundaries in the plurality of hypothetical seismic profiles detected at the time of the depositing; analyzing the mechanical property model of the subsurface geologic region to determine the presence and location of an in-plane in the subsurface geologic region, and The location of the hydrocarbon reservoir in the subsurface geological region is determined by a determining device (49) using the location of the entry face.
2. The method of claim 1, wherein the subsurface geologic region comprises a plurality of reservoirs.
3. The method according to claim 1 or 2, wherein the step of creating a model of mechanical properties further comprises the steps of: developing a model including optimal logging correlations based on the boundaries, and The model including optimal logging correlations is adjusted based on the derived formation time data and formation pressure data.
4. The method of claim 1 or 2, wherein the step of creating a mechanical property model of the subsurface geologic region further comprises evaluating the mechanical response of one or more reservoirs to the derived formation time data and formation pressure data, wherein the mechanical property model is also created based on the mechanical response of the one or more reservoirs to the effects of the formation time data and formation pressure data.
5. A system configured to determine a location of one or more reservoirs in a subsurface geological region, wherein the system comprises: An apparatus (40) configured to create a model of mechanical properties of a subsurface geologic region, the apparatus (40) comprising: Means configured to receive gamma ray data, acoustic data, or measured density data measured in a log in the subsurface geological region; A first deriving device (43) configured to derive formation time data from geometrical features within the seismic interpretation and data from the well log measurements; a second deriving device (44) configured to derive formation pressure data from geometrical features within the seismic interpretation and data from well logging measurements; A first creation device (41) configured to create a plurality of hypothetical seismic profiles at the time of deposition based on a seismic interpretation of the subsurface geological region and the derived formation time data and formation pressure data; a detection device (45) configured to detect boundaries in a plurality of hypothetical seismic profiles at the time of deposition using the gamma ray data, the acoustic data, or the measured density data received, and A second creation device (42) configured to create a mechanical property model of the subsurface geologic region based on the plurality of hypothetical seismic profiles at the time of the depositions, the derived formation time data and formation pressure data, and the boundaries in the plurality of hypothetical seismic profiles detected at the time of the depositions, The system further comprises: A determining device (49) configured to analyze the mechanical property model of the subsurface geological region to determine a presence and a location of an entry face in the subsurface geological region, the location of the entry face being used to determine a location of one or more reservoirs in the subsurface geological region.
6. The system of claim 5, wherein the second creation device (42) further comprises a development device (46) configured to develop a model comprising an optimal logging correlation based on the boundary, and an adjustment device (47) configured to adjust the model comprising an optimal logging correlation based on the derived build time data and build pressure data.
7. The system of claim 5 or 6, wherein the apparatus (40) further comprises an evaluation device (48) configured to evaluate mechanical responses of one or more reservoirs to the derived build time data and build pressure data, wherein the second creation device (42) is configured to create the mechanical property model further based on the mechanical responses of the one or more reservoirs to the derived build time data and build pressure data.

Description

Method and system for determining the location of a hydrocarbon reservoir Technical Field The present invention relates to geologic modeling, and in particular, to methods and systems for creating a model of mechanical properties of a subsurface geologic region and for determining the location of a hydrocarbon reservoir. Background Geologic modeling is used to create a computer-based representation of a subsurface region, which is referred to as a geologic model. Such geologic models may then be used to simulate hydrocarbon reservoirs or sedimentary basins. The geologic model may be used for a number of purposes. For example, the geologic model may be used as input to a computer program to simulate the movement of fluids within a modeled subsurface region. These computer programs can then be used to predict hydrocarbon production, volume of a hydrocarbon reservoir as a function of time, or for predicting the presence of a hydrocarbon reservoir. Geological modeling of a subsurface region may be based on different geological features, such as Liu Po terrain (clinoform) or vertical slopes (plummet). Liu Po the terrain is a sloped subsurface deposit and is well known in the art of structural geology. These sedimentary structures are formed by reversing the continental shelf as the sea level descends. Liu Po terrain thus describes a two-dimensional surface that can be defined as extending downwardly from the wave floor (below sea level) to the bottom of a generally flat basin. As a result of this erosion-based formation process, liu Po terrain is typically formed in areas with fine-grained rock (as can be found in silt or clay), thin and uniform layers, and shows the presence of linear flow marks due to sea water backset. Many subsurface structures found in the arciqua abb have been related in the past to the retrograde of sea level and are therefore described as Liu Po terrain. However, certain structural and structural impacts seen in the subsurface region of abb's ratio exhibit characteristics or properties that cannot be explained using the emerging patterns of the above Liu Po terrain. Thus, the deposition surface found at the abb ratio needs to be characterized using different criteria and methods. The deposition surface of the abb ratio generally exhibits a complex deposit build-up that may be referred to as a "vertical slope". These vertical slopes are difficult to draw and a new approach is needed to reliably simulate the formation of these deposition surfaces. Vertical slopes are well studied from structural, stratigraphic and depositional points of view. Unlike Liu Po terrain, vertical slopes describe an assessment of the build impact of a complex layer layout that results in a deposit. Vertical slopes are observed in many reservoirs in abb oil fields and can be found especially in formations of times Aptian, turonian/Coniacian, berriasian-VALANGNIAN and Tithonian. Common to all of the above formations is that they are carbonate formations. In abb, these carbonate formations typically contain significant amounts of hydrocarbons. Knowing the formation of vertical slopes can improve the reliability of identifying and developing hydrocarbon accumulation or fields found in the abb's subterranean zone. Unlike Liu Po terrain, vertical slopes are not depositional features. The vertical slope additionally originates from the impact of constructional activity acting simultaneously with the deposit feed, resulting in the formation of a vertical slope zone parallel to the control fault line or the main fault line. Vertical slopes are generally found only parallel to the main fault line that is common in abb. In addition, sea level oscillations over time are combined with the formation activity of the subsurface region, supporting the growth of vertical slopes is often characterized by formation events. Vertical slopes are a property of the basin edge formation and may be defined as a two-dimensional surface having an S-shaped (sloped) geometry. Evidence of the existence of vertical slopes can be identified from seismic, log and outcrop data and used to define basin edges, stacking patterns and land frame edge trajectories. Ancient basin depth and relative sea level fluctuations are also deduced from the height and geometry of the vertical slope. Thus, a deeper understanding of vertical slope formation facilitates layer sequence geology and basin analysis, and this understanding allows for a more accurate prediction of the location and size of subsurface hydrocarbon accumulation. However, it is necessary to update the model of the abb oilfield to enhance oil and gas recovery because the heterogeneous reservoir is not depleted equally throughout the oilfield. Thus, it is useful to gain insight into the establishment of specific target areas within a reservoir to evaluate factors that have the greatest impact on the production and recovery of hydrocarbons in the reservoir, such as compartmentalization, flow paths,