水力裂缝及天然裂缝相交延伸规律及真三轴物理模拟实验

Intersection and propagation laws of hydraulic fractures and natural fractures and true axial physical simulation experiment

肖阳 张丽英 邓虎成 邓勇 何文 王盾

XIAO Yang ZHANG Liying DENG Hucheng DENG Yong HE Wen WANG Dun

成都理工大学能源学院 成都理工阳光能源科技有限公司 中国石化西北油田分公司完井测试管理中心 中国石油塔里木油田分公司职工教育培训中心

College of Energy, Chengdu University of Technology, Chengdu 610059, Sichuan, China Chengdu Ligong Sun-Energy Technology Co., Ltd., Chengdu 610059, Sichuan, China Completion Testing Management Center, SINOPEC Northwest Oilfield Company, Urumqi 830011, Xinjiang, China Staff Education and Training Center, PetroChina Tarim Oilfield Company, Korla 841000, Xinjiang, China

真实的裂缝性储层水力压裂并非全是经典理论中的对称压裂，有的会形成复杂的压裂缝网，天然裂缝的存在导致地应力的改变是该现象形成的一个重要原因。目前对于水力裂缝与天然裂缝相交后延伸情况的研究，虽然有系统的理论和方法，但针对特定参数进行满足实际开发需求的定量研究尚未见报道。为此，在前人的理论基础上，改进了水力裂缝与天然裂缝相交作用准则，以鄂南油藏红河92井区为对象，绘制了该区块相交作用图版，分析水力裂缝延伸规律。同时进行了真三轴物理模拟实验，对比论证了相交作用图版的正确性，并为鄂南油藏红河92井区压裂施工提出建议，力求为油田实际开发设计提供理论依据和参数指导。

The hydraulic fracturing in real fractured reservoirs is not completely the symmetric fracturing as described in the classic theory and sometimes can form complex fracture networks. The geostress change caused by the existence of natural fractures is one of the important reasons for the occurrence of this phenomenon. At present, there are systematical research theories and methods for the propagation of hydraulic fractures and natural fractures after their intersection, but the quantitative research on the particular parameters to meet the actual development demands has not been reported. In this paper, the intersection criterion of hydraulic fractures and natural fractures was improved based on previous theoretical base. Then, taking Well Block Honghe 92 of Enan oil reservoir as the research object, the intersection chart of this block was plotted and the propagation laws of hydraulic fractures were analyzed. In addition, true triaxial physical simulation experiment was carried out to comparatively demonstrate the correctness of the intersection chart. Finally, the suggestions on the fracturing construction in Well Block Honghe 92 of Enan oil reservoir were proposed, so as to provide theoretical basis and parameter guidance for the actual oilfield development design.

10.13639/j.odpt.2021.01.013