CAJ | 학술논문

C2断块进入开发后期，储层非均质性强，综合含水高，开发效果变差。针对 C2断块的开发现状，开展了调驱技术研究。通过大量室内实验研究，优选出合适的调驱体系。实验结果显示：在134×10-3μm2天然岩心中，1200mg/ L 调驱剂的封堵率为83.35%，驱油效率为15.46%，表明其具有较强封堵能力和较高驱油效率。结合物模和数模的研究，优化调驱参数并制定油藏调驱方案。段塞结构为：前缘段塞1200mg/ L 凝胶，主体段塞1200mg/ L 聚合物，抗稀释段塞1500mg/ L 聚合物。经预测该调驱方案实施后可累计增油6355.8t，吨聚增油186.9t/ t。
C2단괴진입개발후기，저층비균질성강，종합함수고，개발효과변차。침대 C2단괴적개발현상，개전료조구기술연구。통과대량실내실험연구，우선출합괄적조구체계。실험결과현시：재134×10-3μm2천연암심중，1200mg/ L 조구제적봉도솔위83.35%，구유효솔위15.46%，표명기구유교강봉도능력화교고구유효솔。결합물모화수모적연구，우화조구삼수병제정유장조구방안。단새결구위：전연단새1200mg/ L 응효，주체단새1200mg/ L 취합물，항희석단새1500mg/ L 취합물。경예측해조구방안실시후가루계증유6355.8t，둔취증유186.9t/ t。
At the later stage of development,C2 block has strong reservoir heterogeneity,high water - cut,and poor de-velopment effect. According to the development situation of C2 block,the conformance control flooding was studied. Through a larger number of lab experiments,the suitable conformance control system was selected. The experimental results showed that under the condition of the conformance control system with a concentration of 1,200 mg/ L and natural core with a permeability of 134 × 10 - 3 μm2 ,the plugging rate was 83. 35% and the oil displacement efficiency was 15. 46%OOIP. This indicated strong plugging ability and high oil displacement efficiency. Based on studies of the physical model and mathematical model,injection parameter and displacement scheme were optimized. The optimal displacement scheme was as follows:pre - slug of gel with a concentration of 1,200 mg/ L,main slug of polymer solution with a concentration of 1,200 mg/ L,and anti - dilution slug of polymer solution with a concentration of 1,500 mg/ L. If the displacement plan is implemented,the project will reach an accumulative increased oil of 6,355. 8 tons,with an incremental oil of 186. 9 tons per ton of polymer.