致密砂岩油藏多缝压裂工艺优化与现场应用

发布时间：2018-05-02 04:02

本文选题：致密砂岩 + 多缝压裂　；参考：《钻采工艺》2017年06期

【摘要】：针对渗透率不足0.3 mD的致密砂岩油藏常规工艺压裂改造效果较差的现状,提出了提高油层纵向动用程度,增加裂缝泄油体积的多缝压裂技术思路。在试验区压裂地质特征研究基础上,优选了斜井多缝、定向射孔多缝两项压裂工艺,开展了射孔工艺优化、裂缝参数优化及配套压裂工具研发,成功实现了25m厚油层压裂4条裂缝的突破。通过井底压力监测、净压力拟合分析、井下微地震监测等多种裂缝监测手段,验证分压效果,独立裂缝有效性达90.9%;现场试验17口井,平均改造2.9段,单井日增油0.7 t,增产效果显著。
[Abstract]:In view of the fact that the conventional fracturing effect of tight sandstone reservoir with permeability less than 0.3 mm is poor, the paper puts forward the idea of multi-fracture fracturing technology to improve the vertical production degree of reservoir and increase the volume of fracture leakage. On the basis of the study on the geological characteristics of fracturing in the experimental area, two fracturing techniques, namely, inclined wells with multiple fractures and directional perforations with multiple fractures, are selected, and the perforation process optimization, fracture parameter optimization and the development of matching fracturing tools are carried out. The breakthrough of 4 fractures in 25 m thick reservoir fracturing has been successfully realized. Through various fracture monitoring means such as bottom hole pressure monitoring, net pressure fitting analysis, downhole micro-seismic monitoring and so on, the effect of partial pressure is verified, and the effectiveness of independent fractures reaches 90.9. The increasing oil of single well is 0.7 t, and the effect of increasing production is remarkable.
【作者单位】：长庆油田分公司油气工艺研究院;
【基金】：国家科技重大专项“大型油气田及煤层气开发”中的“鄂尔多斯盆地大型低渗透岩性地层油气藏开发示范工程”(编号:2016ZX05050);国家科技重大专项“大型油气田及煤层气开发”中的“鄂尔多斯盆地致密油开发示范工程”(编号:2017ZX05069)
【分类号】：TE357

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