深层碳酸盐岩大斜度井及水平井纤维暂堵转向分段压裂参数优化

朱雯钊; 苗娟; 陈思韵; 雷蕾; 刘菊

doi:10.3969/j.issn.1006-6535.2022.03.025

特种油气藏 >

2022 , Vol. 29 >Issue 3: 170 - 174

DOI: https://doi.org/10.3969/j.issn.1006-6535.2022.03.025

钻采工程

深层碳酸盐岩大斜度井及水平井纤维暂堵转向分段压裂参数优化

朱雯钊 ,
苗娟 ,
陈思韵 ,
雷蕾 ,
刘菊

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1.中国石油西南油气田分公司,四川成都 610000;
2.西南石油大学,四川南充 637000;
3.中国石油济柴动力有限公司,四川成都 610000

朱雯钊(1985—),女,工程师,2007年毕业于四川大学化学工程与工艺专业,现主要从事天然气净化研究工作。

收稿日期: 2021-05-31

修回日期: 2022-04-22

网络出版日期: 2023-01-09

基金资助

中国石油科技重大专项“西南油气田天然气上产300亿立方米关键技术研究与应用”(2016E-06)

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Optimization of Fracture Parameters for Staged Fracturing with Temporary Fiber Plugging and Diversion in Highly Deviated Wells and Horizontal Wells in Deep Carbonate Reservoirs

Zhu Wenzhao ,
Miao Juan ,
Chen Siyun ,
Lei Lei ,
Liu Ju

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1. PetroChina Southwest Oil and Gasfield Company, Chengdu, Sichuan 610000, China;
2. Southwest Petroleum University, Nanchong, Sichuan 637000, China;
3. CNPC Jichai Power Company Limited, Chengdu, Sichuan 610000, China

Received date: 2021-05-31

Revised date: 2022-04-22

Online published: 2023-01-09

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摘要

为进一步提高四川盆地高石梯-磨溪地区Ⅱ、Ⅲ类储层大斜度井及水平井分段压裂的段数,实现全井段压裂,通过开展室内暂堵转向分段压裂物理模拟实验优化分段压裂参数。研究表明:暂堵纤维质量分数及施工排量是影响转向效果的关键因素;纤维长度为3～12 mm的纤维组合,在质量分数为2.5%,排量为120~250 mL/min时,封堵压力达到限压15 MPa,形成稳定封堵且无突破。将研究结果应用于高石梯-磨溪地区Ⅱ、Ⅲ类储层大斜度井及水平井多级分段压裂,证实了该工艺技术的可行性,相比同类未实施分段压裂的储层,测试产量提高46%。该研究对促进碳酸盐岩中低品位资源的有效动用提供了借鉴。

关键词： 深层碳酸盐岩; 大斜度井; 水平井; 纤维暂堵转向; 多级分段压裂; 四川盆地

本文引用格式

朱雯钊 , 苗娟 , 陈思韵 , 雷蕾 , 刘菊 . 深层碳酸盐岩大斜度井及水平井纤维暂堵转向分段压裂参数优化[J]. 特种油气藏, 2022 , 29(3) : 170 -174 . DOI: 10.3969/j.issn.1006-6535.2022.03.025

Abstract

To further increase the number of stages of staged fracturing and achieve full-well staged fracturing of highly deviated wells and horizontal wells in Types II and III reservoirs in Gaoshiti-Moxi Area, Sichuan Basin, a laboratory experiment was conducted for physical simulation of temporary plugging and turnaround staged fracturing to optimize staged fracturing parameters. The study showed that, the mass fraction of temporarily plugged fibers and the construction displacement are the key factors affecting the diversion effect; the plugging pressure reached the pressure limit of 15 MPa at a mass fraction of 2.5% and a displacement of 120-250 mL/min for fiber combinations with fiber length of 3-12 mm, forming a stable plug without breakout. The results of the study were applied to multi-stage fracturing of highly deviated wells and horizontal wells in Types II and III reservoirs, Gaoshiti-Maoxi Area, confirming the feasibility of the technology. The test production was increased by 46% compared to similar reservoirs where staged fracturing was not implemented. The study provides a reference for promoting the effective prediction of low-grade resources in carbonates.

Key words： deep carbonate rock; highly deviated well; horizontal well; fiber temporary plugging and diversion; multistage staged fracturing; Sichuan Basin

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