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

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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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 thermal recovery horizontal wells completed with screens, once the comprehensive water cut rises, there is currently no effective water plugging and profile control measures

At present, the plugging and regulating technology used in the field generally has problems such as high engineering risk, high cost, weak plugging strength, and poor selectivity.

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