油气藏评价与开发 ›› 2021, Vol. 11 ›› Issue (5): 782-792.doi: 10.13809/j.cnki.cn32-1825/te.2021.05.017
• 综合研究 • 上一篇
收稿日期:
2021-04-16
出版日期:
2021-10-26
发布日期:
2021-10-12
作者简介:
雷洋洋(1995—),男,在读硕士研究生,研究方向油气田开发。地址:四川省成都市新都区新都大道8号西南石油大学国家重点实验室,邮政编码:610500。E-mail: 基金资助:
LEI Yangyang1(),WANG Hui2,WU Xin2,YANG Li3,SHI Le2,WANG Shuai2
Received:
2021-04-16
Online:
2021-10-26
Published:
2021-10-12
摘要:
油井重复压裂是目前国内多数低渗油田恢复老井产能的主要措施之一。新疆某低渗砾岩油藏采用了不同直井重复压裂改造措施,其改造机理尚不清晰。通过建立地质力学模型、基于有限元法的孔隙压力诱导应力变化机理模型以及非结构化油藏数值模型,对重复压裂的裂缝形态及改造措施效果进行研究分析。结果表明:相较于首次压裂和普通重复压裂,体积重复压裂后裂缝形态变化显著。生产前后地应力方位变化不显著,但孔隙压力及地应力变化对水力裂缝的形态的影响较大。对于已经射开的层位,由于地层能量亏空较大,导致其裂缝扩展难度大,缝长较短,缝宽较大;而当存在补层时,由于地层能量充足,裂缝扩展较为容易。补层位置较高井可有效提高储层纵向动用程度,增产效果较好。重复压裂时机对增加产油效果影响明显,及时开展重复压裂更有助于提升单井产油能力。
中图分类号:
雷洋洋,王辉,武鑫,杨莉,史乐,王帅. 砾岩致密油藏直井重复压裂裂缝形态分析[J]. 油气藏评价与开发, 2021, 11(5): 782-792.
LEI Yangyang,WANG Hui,WU Xin,YANG Li,SHI Le,WANG Shuai. Analysis of fracture geometry for refractured vertical wells in tight conglomerate reservoir[J]. Petroleum Reservoir Evaluation and Development, 2021, 11(5): 782-792.
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