Same-well microseism monitoring process in hydraulic crushing process

A technology for hydraulic fracturing and monitoring technology, which is applied in the field of petroleum fracturing, can solve the problems of low signal-to-noise ratio, complex downhole microseismic monitoring technology in adjacent wells, and difficult signal pickup, so as to reduce the limitation of monitoring distance and improve microseismic monitoring. Earthquake monitoring effect, effect of simplified microseismic monitoring process

Active Publication Date: 2017-12-15
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The main purpose of the present invention is to solve the problems of low signal-to-noise ratio, complex interference, difficult signal picking and complex downhole microseismic monitoring process of adjacent wells, which affect the production of monitoring wells or have no optional monitoring wells, etc. Through the combination of downhole optical fiber sensing microseismic monito

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The invention discloses a micro-seismic monitoring process in the same well during hydraulic fracturing, which comprises the following steps:

[0027] 1) Establish an initial velocity model based on well logging data;

[0028] 2) Determine the fracturing string according to the fracturing process, and connect the three-component geophone with the ground instrument through the armored cable;

[0029] 3) Determine the spatial orientation of the three-component geophone in the well and adjust and optimize the velocity model;

[0030] 4) After the positioning of the three-component geophone and the optimization of the velocity model are completed, fracturing is started according to the fracturing design, and the micro-seismic signals generated by hydraulic fracturing are picked up by the three-component geophone during the fracturing process;

[0031] 5) Analyze and process the microseismic signals generated by hydraulic fracturing picked up by the three-component geophone...

Embodiment 2

[0034] On the basis of Embodiment 1, the same-well micro-seismic monitoring process in a hydraulic fracturing process of the present invention is specifically implemented according to the following steps:

[0035] 1) Acoustic wave data such as compressional wave, shear wave velocity data, and longitudinal and transverse wave acoustic time difference are obtained according to acoustic logging or full wave train logging, combined with other logging data such as gamma ray, density, potential, resistivity and formation data in layered medium assumptions Next, the initial velocity model is constructed by seismic processing interpretation, interferometric imaging and other methods;

[0036] 2) Determine the fracturing string according to the fracturing process, and connect the three-component geophone with the ground instrument through an armored cable. The fracturing string can be tool tubing fracturing or coiled tubing with bottom seal dragging fracturing, When the tool tubing is ...

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Abstract

The invention discloses a same-well microseism monitoring process in a hydraulic crushing process. The same-well microseism monitoring process includes the steps of establishing an initial speed model according to logging data, determining cracked tubular column according to the crushing process, connecting a three-component geophone with a ground apparatus through an armored cable, determining the spatial direction of the three-component geophone in a well and adjusting and optimizing a speed model, after positioning the three-component geophone and optimizing the speed model, crushing, picking microseism signals due to hydraulic crushing during the crushing process, analyzing and processing the picked microseism signals, and determining the crack space presentation and distribution rules according to the distribution of microseism event points in combination with a crushing curve. Through the effectively cooperation of the five technical means, the defects of ground array, near-surface and adjoining well underground microseism monitoring technologies can be overcome. The process flow is simplified, and the monitoring effect is improved.

Description

technical field [0001] The invention belongs to the technical field of petroleum fracturing, and in particular relates to a same-well micro-seismic monitoring process in the process of hydraulic fracturing. Background technique [0002] Real-time monitoring of oilfield production dynamics by microseismic methods is a frontier subject of widespread concern at home and abroad, and remarkable progress has been made. Microseismic monitoring technology has been widely used in water fracturing fracture monitoring, reservoir dynamic monitoring, water injection monitoring, etc. The field has been highly recognized by the petroleum industry. At present, microseismic has become a new direction for the development of geophysical technology. [0003] The principle of microseismic monitoring is a geophysical technology that monitors the impact, effect and underground state of production activities by observing and analyzing small seismic events generated in production activities. Its bas...

Claims

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Application Information

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IPC IPC(8): G01V1/40E21B43/267
CPCE21B43/267G01V1/40
Inventor 孙虎兰建平许洪星马新东钟新荣尹国勇杨燕杨敏
Owner BC P INC CHINA NAT PETROLEUM CORP
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