摘要
致密砂岩气藏由于其特有的地质特征极易导致水锁损害,而损害一旦发生则难以完全解除。针对此现象进行水锁评价实现研究,提出气藏水锁评价方法的改进建议,并设计欠平衡条件下的水锁损害模拟装置,以实现水锁情况的准确分析。结合现场岩心实验评价,认为避开盐析现象可以提高水锁评价效果,且在考虑合理欠压值的条件下,欠平衡钻井对于水锁损害有良好的保护效果。
Tight sandstone gas reservoir is easy to appear water blocking damage , which would be very difficult to unlock and seriously affect the gas reservoir development once occurred. Thus, establishing an accurate evaluation experiment method of water blocking is extremely important. Based on the existing evaluation experiment, this pa- per proposed improved water locking damage evaluation method on tight sandstone and designed water blocking damage simulation device in underbalaneed conditions. And it could be more accurate in evaluation of water bloc- king situation. Combined with the site core the result shows that： taking salting problem into account can increase the evaluation results; under reasonable pressure it has good protective effect in underbalanced drilling.
出处
《重庆科技学院学报（自然科学版）》
CAS
2015年第4期13-16,共4页
Journal of Chongqing University of Science and Technology：Natural Sciences Edition
基金
国家科技重大专项"低渗气藏复杂地层高效钻井关键技术"(2011ZX05022-005)
关键词
致密砂岩气藏
水锁损害
欠平衡钻井
评价实验
tight sandstone gas reservoirs
water blocking damage
underbalanced drilling
evaluation experiment
