定边油田TS区域长4+5_(1)^(2)非常规致密砂岩油藏配套开发工艺研究

Study on Key Matching Technology of Chang 4+5 Unconventional Tight Sandstone Reservoir in Tangshan Area

针对定边油田TS区域长4+5_(1)^(2)小层投产油井表现出的初产高、降产快,无稳产期的问题,在研究该小层地质特点的基础上,通过选取地质条件相近的8口井分别从前置液比例、米加砂量、砂比等方面进行了对比试验,结果表明:研究区4+5_(1)^(2)小层合适的前置液比例为80%,排量为2.4m^(3)/min,砂比为10%,米加砂量为13m^(3)/m。随后该工艺进一步在区域内推广,效果较好,为油田同类型油藏下一步开发及调整提供了新思路。

In view of the problems of high initial production,rapid production reduction and unstable production of C4+512 sub layer in TS area of Dingbian oilfield,based on the study of geological characteristics of this sub layer,comparative field tests were conducted on 8 wells with similar geological conditions from the aspects of preflush ratio,sand addition amount per meter and sand ratio.The results show that the suitable pre fluid ratio of small layer C4+512 in the study area is 80%,and the drainage rate is 2.4m^(3)/min,10%sand ratio and 13 m^(3)/m of sand.Then,the technology was further popularized in the region,and the effect was good,which provided a new idea for the next development and adjustment of the same type of reservoirs in the oilfield.