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低渗透储层存在许多错误认识,如岩石高压缩性、强应力敏感、启动压力梯度和滑脱效应。这些都是实验室里的结论,都没有经过实践的检验,都不是科学认识,它们是由实验的系统误差所致。大量的生产实践已经表明,低渗透储层不存在强应力敏感。泥岩烃源层中的油气能够运移,说明启动压力梯度并不存在。低渗透储层其实并不特殊,与中高渗透储层也没有本质的区别,只是孔隙稍小、物性稍差、泥质稍多、产能稍低而已。中高渗透储层没有出现的奇特现象,低渗透储层也不会出现。
There are many misconceptions about low permeability reservoirs, such as high compressibility of rock, strong stress sensitivity, starting pressure gradient and slippage effect. These are the conclusions of the laboratory, have not been tested by practice, are not scientific understanding, they are caused by the experimental system error. A large number of production practices have shown that there is no strong stress sensitivity in low permeability reservoirs. Oil and gas in the source rocks of mudstone can migrate, indicating that the starting pressure gradient does not exist. Low-permeability reservoirs are not unique in fact, and there is no essential difference with medium- and high-permeability reservoirs, except that the pores are slightly smaller, the physical properties are slightly poorer, the muds are slightly more, and the productivity is lower. High-permeability reservoirs did not appear strange phenomenon, low permeability reservoir will not appear.