基于有限元数值模拟的裸眼射孔完井产能评价  

Productivity evaluation of open-hole perforation completion based on finite element numerical simulation

作　　者：翁昊阳 王晓鹏 张启龙 董平华 高斌 刘伟[2] 谭强[2] WENG Haoyang;WANG Xiaopeng;ZHANG Qilong;DONG Pinghua;GAO Bin;LIUWei;TAN Qiang(Tianjin Branch of CNOOC(China)Ltd.,Tianjin 300459,China;State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum-Beijing,Beijing 102249,China)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300459 [2]中国石油大学(北京)油气资源与探测国家重点实验室,北京102249

出　　处：《石油科学通报》2023年第2期152-165,共14页Petroleum Science Bulletin

基　　金：国家科技重大专项渤海油田高效开发示范工程(2016ZX05058)资助。

摘　　要：随着油气勘探开发的不断推进,非常规油气资源被愈发关注。对于测试、开发过程,提产工作是其中关键一环,然而常规的完井方式已经不能满足油田对产能的需求。为提高渤海某油田致密砂砾岩储层测试产能,依据降低地层污染和增大井筒暴露面积的原理,本文提出了裸眼射孔的新完井方式。基于有限元方法建立了产能评价的三维模型,并对特定工况下裸眼射孔、裸眼、套管射孔等完井方式的产量进行分类评价。之后对影响裸眼射孔完井方式产能的参数进行了敏感性分析,最终利用二维平面射孔井模型揭示了射孔井增产机理,利用产能评价的室内实验验证了数值模拟所得规律。研究表明,裸眼射孔完井方式能有效提高测试产能,提产效果受地层条件和射孔参数组合控制,较裸眼完井的提产比例约40%~80%,较套管射孔完井的提产比例约10%~130%。本研究为非常规油气井完井方式的选择提供了新思路,为现场提产方案制定提供了依据和参考。With the continuous advancement of oil and gas exploration and development,unconventional oil and gas resources have been paid more and more attention.The production improvement is a key part of the well-test and development process,but conventional completion forms can no longer meet the oilfield’s production requirements.Therefore,in order to improve the well test productivity of tight glutenite reservoirs in Bohai Oilfield,based on the principles of reducing formation pollution and increasing the exposure area of the wellbore,a new completion form was proposed,namely open-hole perforation.Using the finite element theory,a three-dimensional model of productivity evaluation was established,and the production of different completion forms,such as open-hole perforation,open-hole and casing perforation,under specific working conditions were classified and evaluated.Afterwards,the sensitivity analysis of the parameters affecting the productivity of open-hole perforation completion was carried out.Finally,a two-dimensional planar model for perforated well was used to reveal the production improvement mechanism,and the indoor experimental results for productivity evaluation verified the laws obtained by numerical simulation.Studies have shown that the open-hole perforation completion can effectively increase the well test productivity,and the productivity improvement effect depends on the formation conditions and perforating parameter combination.Compared with the openhole completion,the rate of productivity improvement is about 40%~80%.Compared with the casing perforation completion,the rate of productivity improvement is about 10%~130%.This study provides a new idea for the selection of unconventional oil and gas well completion forms,which can provide basis and reference for the formulation of on-site production improvement plans.

关 键 词：测试产能 裸眼射孔 有限元 室内实验 提产效果 

分 类 号：TE52[石油与天然气工程—油气田开发工程] TB115[理学—数学]