›› 2019, Vol. 40 ›› Issue (3): 1-1.doi: 10.7657/XJPG20190313

• 论文 •    

大北气田白垩系致密裂缝性储集层压力敏感特征

易艳a,张泽楷b,崔小虎b,廉凌峰c,杨果a,张博a   

  1. (中国石油 塔里木油田分公司 a.勘探开发研究院;b.开发事业部;c.天然气事业部,新疆 库尔勒 841000)
  • 出版日期:2019-06-01 发布日期:1905-07-17

Pressure Sensitivity Characteristics of Cretaceous Tight Fractured Reservoirs in Dabei Gas Field

YI Yana, ZHANG Zekaib, CUI Xiaohub, LIAN Lingfengc, YANG Guoa, ZHANG Boa   

  1. (PetroChina Tarim Oilfield Company, a.Research Institute of Exploration and Development; b.Development Department; c.Natural Gas Department, Korla, Xinjiang 841000, China)
  • Online:2019-06-01 Published:1905-07-17

摘要: 塔里木盆地库车坳陷大北气田具有储集层埋深大、岩性致密、基质孔隙不发育和裂缝发育的特征。实验研究表明,大北气田储集层具有强烈的压力敏感性,并且气层一旦产生压力敏感,会导致裂缝闭合,造成储集层物性的永久性损害,产量急剧下降。通过岩心压力敏感实验,确定了大北气田储集层产生压力敏感的静压力;在求取气藏所受构造应力场的基础上,结合地层实际压力,确定了大北气田不同构造位置气藏产生压力敏感的具体地层压力。在气田开采过程中,应在气藏压力降低到敏感值前及时采取措施,控制压力敏感的发生,以维持产量,提高采收率。

Abstract: The reservoirs in Dabei gas field of Kuqa depression, Tarim basin are characterized by large buried depth, tight lithology, undeveloped matrix pores and developed fractures. The relevant experimental study shows that a strong pressure sensitivity is found in the reservoir of Dabei gas field, and once pressure sensitivity occurs in gas layers, fractures will be closed and permanent damages to reservoir physical property and a sharp decline in production will happen. A static pressure value for reservoir pressure sensitivity in Dabei gas field is determined through core pressure sensitivity test. Based on the obtained tectonic stress field of the gas reservoirs and combining with the actual formation pressure, the formation pressure leading to pressure sensitivity is determined for the gas reservoirs at different structural positions in Dabei gas field. During the production process of the gas field, before the gas reservoir pressure decreases to the pressure sensitivity threshold value, measures should be taken timely to avoid pressure sensitivity, maintain gas production and enhance gas recovery

中图分类号: