资源与产业 ›› 2016, Vol. 18 ›› Issue (1): 37-42.DOI: 10.13776/j.cnki.resourcesindustries.20151230.007

• 资源开发 • 上一篇    下一篇

深层变质岩潜山油藏区块整体压裂技术

张子明   

  1. (中油辽河油田公司钻采工艺研究院,辽宁 盘锦 124010)
  • 出版日期:2016-02-18 发布日期:2016-02-18

WHOLE HYDRAULIC FRACTURING TECHNIQUE OF METAMORPHIC BURIED HILL RESERVOIR

ZHANG Zi-ming   

  1. (Institute of Drilling and Production, Liaohe Oilfield Company, PetroChina, Panjin 124010, China)
  • Online:2016-02-18 Published:2016-02-18

摘要: S628区块为变质岩潜山储层,自然产能低或无自然产能,必须进行压裂改造才能获得工业油气流。由于储层埋深大,施工压力高,天然裂缝发育,压裂加砂异常困难。为了降低压裂施工风险,提高区块采收率,通过压前储层综合评价、压后产量综合影响因素分析、压裂设计参数优化等的研究,结合国内外类似岩性储层压裂改造经验,确定了区块整体压裂方案。该方案中确定了不同渗透率条件下的裂缝长度和导流能力,根据储层特点优选了压裂液体系,优化了前置液百分数、排量、加砂规模等关键参数,结合目标区块的物性条件变化特征,确定了科学合理的施工参数。S628区块累计实施压裂15井次,施工成功率100%,压后普遍取得良好效果,累计增油超过35万t。

关键词: 深层变质岩, 潜山, 整体压裂, 压裂液

Abstract: S628 block which is a metamorphic buried hill reservoir with low or no oil recovery may gain commercial oilgas only after being fractured.Due to a deep buried depth, high pressure and developed fissure, it is difficult to fracture to fill sand.In order to reduce engineering risks and to increase oilgas recovery, this paper, based on reservoir evaluation before pressuring, production evaluation after pressuring, and fracturing parameters optimization, determines to use the whole hydraulic fracturing technique by combining similar fracturing experience. This technique, according to fissure length and residual conductivity under different permeability, selects hydraulic fracturing system, optimizes the pad liquid percentage, emission, frac sand filling size, determines the engineering parameters in accordance with the block features. Fifteen times of hydraulic fracturing were proceeded in S628 block with 100% success. 35 000 t oil was totally increased.

Key words: metamorphic rocks, buried hill, whole hydraulic fracturing, fracturing fluid

中图分类号: