Thermal recovery horizontal well water shut-off and profile control method

A technology for water plugging and profile control and horizontal wells, which is applied in the fields of fluid production, earthwork drilling, wellbore/well components, etc. It can solve the problems of no water plugging and profile control measures, weak plugging strength, and high engineering risks.

Active Publication Date: 2014-01-22
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

Thermal recovery horizontal wells have a long horizontal section and a large oil drainage area, and can use steam overlay to increase the production of a single well of heavy oil. The main method of construction, high water cut is the main problem affecting the development effect of thermal recovery horizontal wells, especially for therm...

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  • Thermal recovery horizontal well water shut-off and profile control method
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  • Thermal recovery horizontal well water shut-off and profile control method

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Embodiment Construction

[0024] In order to make the above-mentioned and other objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below, and are described in detail as follows in conjunction with the accompanying drawings.

[0025] like figure 1 shown, figure 1 This is a flow chart of a specific embodiment of the method for water plugging and profile control of thermal recovery horizontal wells of the present invention. Among them, the reservoir applicable conditions for the new water plugging and profile control method for thermal recovery horizontal wells are: the oil layer temperature is 40℃-120℃, the surface degassed oil viscosity is 100mPa.s-100000mPa.s (50℃), and the average The permeability is 100mDc -10000mDc, the thickness of the oil layer is 5m-50m, the remaining oil saturation is 0.2-0.8, the average porosity of the oil layer is greater than 0.25, the recovered water is 100%-1000%, and the salinity is less than 100...

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Abstract

The invention provides a thermal recovery horizontal well water shut-off and profile control method. The thermal recovery horizontal well water shut-off and profile control method includes the steps that (1) a water production interval is determined according to a thermal recovery horizontal well differential temperature test technique and oil reservoir geological conditions; (2) the steam injection volume and temperature field distribution are simulated through an oil reservoir value simulation method, an injection scheme is determined, and the injection volume of gel and plugging agents and the size of a displacement slug are optimized; (3) according to the determined injection scheme and the optimized injection volume of the gel and the injection agents, after the gel and the injection agents are injected into the water production interval, the displacement slug is injected, and ultimately steam is injected. According to the thermal recovery horizontal well water shut-off and profile control method, a high-permeability layer is plugged selectively by means of a temperature field, the steam enters an undeveloped oil layer, the steam injection profile of a reservoir is improved, and the purpose of economically and efficiently developing a thermal recovery horizontal well with high water content is achieved.

Description

technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to a method for water plugging and profile control of a thermal recovery horizontal well. Background technique [0002] With the improvement of drilling and completion technology, thermal recovery horizontal wells are used more and more in oil fields. Thermal recovery horizontal wells have a long horizontal section and a large drainage area, which can use steam to increase the production of a single heavy oil well. It is currently the leading technology for tapping potentials in old areas and developing low-grade heavy oil reservoirs, and it is also the thermal recovery productivity of heavy oil reservoirs. The main method of construction, high water cut is the main problem affecting the development effect of thermal recovery horizontal wells, especially for thermal recovery horizontal wells with screen tube completion, once the comprehensive water cut increases, ther...

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Application Information

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IPC IPC(8): E21B43/24
Inventor 曹嫣镔林吉生王秋霞刘明王善堂唐培忠尚跃强于田田刘艳平张紫军王志敏
Owner CHINA PETROLEUM & CHEM CORP
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