CN-116696326-B - Real-time online simulation method and device for displacement efficiency and well cementation operation method

Abstract

The invention provides a displacement efficiency real-time online simulation method and a device thereof and a well cementation operation method, wherein the online simulation method comprises the following steps of S1, acquiring static parameters of a well cementation shaft and acquiring real-time dynamic parameters; the static parameters comprise well structure, well track, well temperature axial distribution and pipe column centering, the real-time dynamic parameters comprise well cementation construction pressure, flow, density and rheological property, S2, establishing a displacement efficiency model considering the retention rate of annulus drilling fluid, S3, inputting the static parameters and the real-time dynamic parameters into the displacement efficiency model, and confirming the displacement efficiency value. The well cementation operation method comprises the steps of inquiring the displacement efficiency of any well depth section and/or the displacement efficiency of the whole annulus in the well cementation operation according to an online simulation method, and dynamically and quantitatively adjusting the ground process and engineering parameters in real time so as to ensure that the optimal displacement efficiency of the annulus is realized. The invention can accurately calculate and display the displacement efficiency of the annular cement slurry to the drilling fluid, and effectively improve and ensure the well cementation operation quality of the oil and gas well.

Inventors

• XIAN MING
• YANG JIANQUAN
• XIANG XUELIN
• XU GUILI
• YU JIAN
• Liao Fuguo
• LIU YANG
• YANG CHUAN
• YU CAIJUN
• FENG YUQI
• WU LANG
• ZHOU TAIBIN
• Zheng Yuanyun
• YU XIN

Assignees

• 中国石油天然气集团有限公司
• 中国石油集团川庆钻探工程有限公司

Dates

Publication Date

20260508

Application Date

20230525

Claims (8)

1. 1. A displacement efficiency real-time online simulation method, the method comprising: S1, acquiring static parameters of a well cementation shaft and acquiring real-time dynamic parameters, wherein the static parameters comprise a well structure, a well track, shaft temperature axial distribution and pipe column centering, and the real-time dynamic parameters comprise well cementation construction pressure, flow, density and rheological property; S2, establishing a displacement efficiency model considering the retention rate of the annular drilling fluid, and S3, inputting the static parameters and the real-time dynamic parameters into the displacement efficiency model, and confirming a displacement efficiency value; when the retention rate of the section drilling fluid is less than or equal to 10%, establishing a displacement efficiency model considering the factors of the retention rate of the annulus drilling fluid and the flushing efficiency of the spacer fluid; the influence factors of the flushing efficiency of the spacer fluid are confirmed through a spacer fluid flushing efficiency equation model, and the spacer fluid flushing efficiency equation is built by acquiring fitting of indoor spacer fluid flushing test data before well cementation operation; the spacer fluid flushing efficiency equation model comprises the following models: spacer fluid flushing efficiency and density model: ; spacer fluid flushing efficiency and reynolds number model: ; Model of spacer fluid flushing efficiency and flushing time: ; Spacer fluid flushing efficiency and annulus return speed model: ; Wherein, the The flushing efficiency of the spacer fluid is achieved; is the density of the isolating liquid; The Reynolds number of the spacer fluid is; Is the flushing time; is the annulus return speed.
2. 2. The displacement efficiency real-time online simulation method according to claim 1, wherein the step S1 further comprises: setting a time step for controlling the calculation frequency of the displacement efficiency value.
3. 3. The displacement efficiency real-time on-line simulation method according to claim 2, wherein the time step is increased by 5 seconds to 10 seconds when the annulus cementing working fluid slurry column length is increased by 100 to 200 meters.
4. 4. The displacement efficiency real-time online simulation method according to claim 1, further comprising S4, performing interpolation processing on the displacement efficiency value, and drawing a displacement efficiency cloud chart.
5. 5. The displacement efficiency real-time online simulation device is characterized by being used for realizing the displacement efficiency real-time online simulation method as claimed in claim 1, and comprising a parameter acquisition module, a displacement efficiency model module and a displacement efficiency confirmation module, wherein, The parameter acquisition module is configured to acquire static parameters of a well cementation shaft and acquire real-time dynamic parameters; the displacement efficiency model module is configured to establish a displacement efficiency model taking into account the retention rate of the annulus drilling fluid; The displacement efficiency confirming module is connected with the parameter obtaining module and the displacement efficiency model module and is configured to confirm a displacement efficiency value according to the static parameter, the real-time dynamic parameter and the displacement efficiency model of the well cementation shaft.
6. 6. A method of cementing operations, the method comprising: According to the displacement efficiency of any well depth section and/or the displacement efficiency of the whole annulus during the well cementation operation, the ground process and engineering parameters are dynamically and quantitatively adjusted in real time so as to ensure the realization of the optimal displacement efficiency of the annulus, wherein the displacement efficiency is obtained according to the online simulation method of any one of claims 1-4.
7. 7. A computer device, the computer device comprising: At least one processor, and A memory storing program instructions, wherein the program instructions are configured to be executed by the at least one processor, the program instructions comprising instructions for performing the displacement efficiency real-time on-line simulation method of any one of claims 1-4 or the cementing operation method of claim 6.
8. 8. A computer readable storage medium having stored thereon computer program instructions, which when executed by a processor, implement the displacement efficiency real-time on-line simulation method of any one of claims 1-4 or the cementing operation method of claim 6.

Description

Real-time online simulation method and device for displacement efficiency and well cementation operation method Technical Field The present invention relates to the field of petroleum well cementation, and in particular, to a displacement efficiency real-time online simulation method, a well cementation operation method, a displacement efficiency real-time online simulation method device, and an apparatus and a computer readable storage medium for implementing the displacement efficiency real-time online simulation method. Background The main purpose of well cementation is to realize good interval packing, however, due to the complexity of well bore conditions, high viscosity, cutting and strong coagulation characteristics of drilling fluid, imperfect displacement mechanism and other reasons, the annulus drilling fluid displacement efficiency is greatly reduced, the displacement efficiency is not high, the channeling phenomenon of the drilling fluid is serious, the interface cementing quality is poor, the interval packing quality is influenced, and oil gas water channeling is possibly caused. Although great breakthrough is made from the research of the displacement efficiency mechanism of the scholars at home and abroad in the 40 th of the last century, six factors affecting the displacement efficiency, namely, the centering degree of the sleeve, the displacement flow state, the turbulent flow contact time, the rheological property and thixotropic property of the drilling fluid, the displacement flow property and the density difference of the displacement fluid and the drilling fluid, are proposed. However, because well cementation is underground hidden system engineering and the unpredictability of underground conditions, the complexity of well cementation annular shafts is increasingly increased along with the development of deep oil and gas reservoirs, shale gas and other unconventional oil and gas reservoirs, and the development of well cementation annular cement paste displacement efficiency simulation analysis and evaluation technology is urgently needed. The research of well cementation annulus displacement efficiency is always conducted by foreign large oil service companies and research institutions, the research covers various aspects of flow mechanism, displacement theory, displacement simulation experiment and the like, and various displacement efficiency experimental devices and experimental methods are established, wherein a full-size displacement simulation experimental device established by Halliburton company is the most typical. The device is characterized in that the actual wellbore size and fluid performance are completely and truly simulated, the displacement efficiency of the well cementation and cementing process is evaluated in two ways, firstly, after cement is solidified, a wellbore and a casing are directly split, the displacement effect of an interface of the wellbore and the casing is directly observed, and secondly, the displacement efficiency of the well cementation and cementing process is tested by using an acoustic amplitude logging method. In terms of displacement efficiency software, displacement efficiency simulation analysis modules in domestic and foreign CemproPlus (optimizing drilling fluid slurry replacement method software), anycem (well cementation software), cemSmart (well cementation engineering design software) and other software fully consider possible multi-aspect influences of well cementation of a complex well, and research and improvement are carried out on a design model from temperature, annular clearance, well diameter change and the like, so that reasonable displacement efficiency calculation precision can be ensured for the complex conditions of small well, small clearance, high-temperature high-pressure well and the like by the software. Unfortunately, the simulation analysis of the annulus displacement efficiency of well cementation exists in the design stage before the well cementation operation, and the annulus displacement efficiency in the well cementation construction process cannot be accurately represented. The existing well cementation operation real-time monitoring technology mainly realizes the real-time monitoring function of well cementation construction parameters (flow, density and pressure), a monitoring system restores an electric signal transmitted by a sensor to a real value and performs visual presentation, the sensor is the key of the whole system, and the input signal is acquired and converted. The system architecture is not internally provided with an engineering calculation related mathematical model unit, so that the key engineering parameters of the well cementation operation cannot be dynamically characterized in real time, and once the actual operation parameters and the design parameters are different, the quality of the annular displacement effect of the sleeve cannot be quantitatively determined, so that the ground proc