扶余油田西5-8区块井网开发方式的优化

The Optimization of Well Pattern Development in Block X5-8 of Fuyu Oilfield

摘要: 扶余油田西5-8区块从1962年开发至今经历了溶解气驱、注水开发和3次较大调整，到2012年10月油井单向受效多，多向受效井少，平均单井日产油0.6 t，含水率达到95.8%；注水开发的中后期，油层剩余油分布复杂，后期注水开发效果差、含水率高、采出程度低。单砂体精细刻画为理论依据，了解油层剩余油分布情况，从单、双注水井开发井网方式、不同井网的水井加密方式以及水井射孔方式进行优化选择，并且降低新、老井注水强度，实施低强度注水政策，可使得油井受效方向发生变化，单砂体控制状况得到改善从而提高注水开发效果。

Abstract: Since 1962, the development of Block X5-8 of Fuyu Oilfield has gone through the dissolved gas flooding, waterflooding and three times of larger adjustment. In October 2012, the oil well was more efficient in single direction and less efficient in multiple directions. The average daily oil production was 0.6 t/d in single well, and the water content was 95.8%. In the middle and later periods of water flooding, remaining oil distribution of the reservoir was complex; the effect of oil production was poor; water content was high with low recovery percent of reserves. The single sand body fine description was used as theoretical basis for understanding the distribution of remaining oil; the single well and dual well development well patterns, the method of infilling of injection wells in different well patterns and ways of perforation in injection wells are optimized and chosen; the injection intensity in old and new wells is reduced for implementing the policy of low intensity injection, by which the effect of oil well direction is changed and control of single sand body is improved to promote the effect of waterflooding.