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根据文南油田文33断块沙三上油藏埋藏深、高温高压、中孔低渗等地质特点,面对投入开发后的前13年间因为与沙二下油藏大井段合采合注,长期处于注不进水、采不出油的困难局面,通过近7年来逐层上返注水开发先导试验,细分开发层系、加密井网和注采完善等一系列措施,对全油藏进行了调整和治理。经过调整和治理,开发状况明显好转,采油速度由0.33%提高到2.29%,成功地实现了高速开发。
According to the geologic characteristics of Shasan oil reservoir in Wen 33 fault block of Wennan Oilfield, buried in deep, high temperature and high pressure, and low permeability of mesopores, in the first 13 years after the project was put into operation, For a long period of time, it was in a difficult situation that water could not be taken in and oil could not be harvested. Through a series of measures such as pilot study on layer-by-layer backwater injection, subdivision of development strata, Adjusted and governed. After adjustment and control, the development status was obviously improved, the oil recovery rate increased from 0.33% to 2.29%, and the high-speed development was successfully achieved.