Method of Water Plugging and Profile Control in Thermal Recovery Horizontal Wells

Abstract

The present invention provides a method for water plugging and profile control of thermal recovery horizontal wells. The method for thermal recovery horizontal well water plugging and profile control includes: step 1, using thermal recovery horizontal well differential well temperature testing technology combined with reservoir geological conditions to determine water output layer section; step 2, simulate the steam injection rate and temperature field distribution by reservoir numerical simulation method, determine the injection plan, optimize the injection rate of gel and plugging agent and the size of the displacement slug; and step 3, according to the determined injection plan And the optimized injection amount of the gel and the plugging agent, after injecting the gel and the plugging agent into the water outlet section, inject the displacement slug, and finally inject steam. The method for water plugging and profile control of thermal recovery horizontal wells uses temperature field to selectively block high-permeability layers, allowing steam to enter undeveloped oil layers, improving the steam absorption profile of reservoirs, so as to achieve the purpose of economically and efficiently developing high water-cut thermal recovery horizontal wells .

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 oilfields. Thermal recovery horizontal wells have a long horizontal section and a large oil drainage area, and can use steam overlay to increase heavy oil single well production. It is currently the leading technology for tapping potential in mature areas and developing low-grade 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 completed with screens, once the comprehensive water cut rises, there is currently no effective water plugging and profile control technology measure...

AI Technical Summary

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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