Method for evaluating temporary plugging intensity performance of in-joint temporary plugging agent for oilfield fracturing
A technology for oil field fracturing and evaluation methods, which is used in measurement devices, suspension and porous material analysis, instruments, etc., and can solve the problems of inability to systematically test, not considering temporary plugging agents, and quantitatively evaluating the temporary plugging strength performance of temporary plugging agents. , to achieve the effect of strong controllability, convenient and simple operation
Inactive Publication Date: 2018-12-07
PETROCHINA CO LTD +1
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Problems solved by technology
However, the current conventional method is to test the deformation and elongation ability of the temporary plugging agent, or simply test the plugging pressure of the temporary plugging agent by using a core holder, without considering the fact that the temporary plugging agent is filled in artificially supported fractures during field construction. However, it is impossible to accurately and effectively test the performance of temporary plugging agents in fracturing operations, and it is impossible to systematically test and quantitatively evaluate the temporary plugging strength performance of temporary plugging agents in fracturing propped fractures, resulting in the inability to select the type of temporary plugging agents
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[0050]Specific implementation method: the present invention will be further described below in conjunction with accompanying drawing and embodiment: the first step: adopt laboratory diversion ability testing device, set experimental parameter:
[0051] (1) Predetermined experimental temperature: According to the geothermal gradient of YP1 block, the reservoir temperature range of YP1-P4 well is determined to be 78°C-89°C. The heat dissipation of the cracking fluid and the heat exchange with the fractured rock will cause the temperature drop of the wellbore and fractures, so 60°C is preferred as the predetermined experimental temperature value for displacement;
[0052] (2) Predetermined closing pressure: Since the temporary plugging agent is filled in artificial cracks during on-site construction and is squeezed by the external closing pressure, in the laboratory test, the influence of the closing pressure on the temporary plugging agent should be considered, according to On-s...
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Abstract
The invention relates to the technical field of oil recovery engineering, and concretely relates to a method for evaluating the temporary plugging intensity performance of an in-joint temporary plugging agent for oilfield fracturing. A problem that existing methods cannot systematically, effectively, quantitatively and accurately evaluate the temporary plugging intensity performance of the in-joint temporary plugging agent for oilfield fracturing is mainly solved. The method for evaluating a test parameter corresponding to the temporary plugging intensity of the in-joint temporary plugging agent is given through simulating temporary plugging of the temporary plugging agent in a fracturing joint by a laboratory flow guiding capability testing device according to base data of fracturing construction. The method can accurately, objectively and effectively evaluate the temporary plugging intensity performance of the in-joint temporary plugging agent for oilfield fracturing.
Description
technical field [0001] The invention relates to the technical field of oil recovery engineering, in particular to a method for evaluating the temporary plugging strength performance of a temporary plugging agent used in oil field fracturing. Background technique [0002] In the process of temporary plugging diversion fracturing and branch fracture fracturing of oilfield vertical wells and horizontal wells, temporary plugging agents are needed to achieve the effect of temporary plugging diversion and branch fracture technological measures. However, the current conventional method is to test the deformation and elongation ability of the temporary plugging agent, or simply test the plugging pressure of the temporary plugging agent by using a core holder, without considering the fact that the temporary plugging agent is filled in artificially supported fractures during field construction. However, it is impossible to accurately and effectively test the performance of temporary p...
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IPC IPC(8): G01N15/08
CPCG01N15/0826
Inventor 王贤君王维张洪涛顾明勇唐鹏飞张浩刘宇李东旭赵亮郑继明冯程滨魏天超
Owner PETROCHINA CO LTD
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