CNPC's progress in horizontal well fracturing technologies for unconventional reservoirs

被引：6
|
作者：
Chen J. [1 ]
Weng D. [1 ,2 ]
机构：
[1] PetroChina Research Institute of Petroleum Exploration & Development, Langfang, 065007, Hebei
[2] Stimulation Department of National Energy Tight Oil and Gas R&D Center, Langfang, 065007, Hebei
来源：
Weng, Dingwei (wendw69@petrochina.com.cn) | 1600年 / Natural Gas Industry Journal Agency卷 / 37期
关键词：
CNPC; Development trend; High density completion; Horizontal well; Technical progress; Unconventional reservoir; Volumetric stimulation;
D O I：
10.3787/j.issn.1000-0976.2017.09.010
中图分类号：
学科分类号：
摘要：
Horizontal well fracturing technology has been developed greatly from scratch to multi-stage fracturing since China National Petroleum Corporation (CNPC for short) initiated the research on horizontal well stimulation in 2006 with 26 stages achieved in 2015. Over the past decade, CNPC has made remarkable progress in horizontal well fracturing technologies for unconventional reservoirs. First, four sets of principal processes for horizontal well fracturing are developed independently, including double-packer and single-slip, packer sliding sleeve, hydraulic jet and open hole packer. Second, two principal processes for high-rate volumetric stimulation of horizontal well are independently developed, i.e., composite bridge plugging and cementing sliding sleeve, and the support optimal design theory of volumetric stimulation, fracturing fluid system and fracture monitoring technology are also established. And thus, the volumetric stimulation technology system and the factory-like horizontal well operation mode are preliminarily formed. Third, the independently developed key technologies of fracturing tools and liquid systems reach the advanced international level or the leading international level of the same year, such as the hydraulic-jet staged fracturing technology with multi-stage sliding sleeve in fixed string and the gel plug segmentation technology. Based on the statistics, horizontal wells account for 3.2% of oil wells and 13.1% of gas wells, and their contribution ratios to oil field and gas field output are 9.9% and 39.7%, respectively. Finally, it is pointed out that CNPC should take the fracturing engineering tests of high density completion and the volumetric refracturing tests in mature fields and old wells as the new research objects of horizontal-well stimulation technologies. © 2017, Natural Gas Industry Journal Agency. All right reserved.
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页码：79 / 84
页数：5
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