东营凹陷多薄层低渗透滩坝砂储层分层压裂工艺优化

发布时间：2018-09-01 11:54

【摘要】：滩坝砂储层具有纵向跨度大、薄层多、物性差及非均质性强等特征,常规笼统压裂效果差,逐级压裂改造费用高、操作复杂,开展分层压裂工艺优化研究具有重要的生产意义。以东营凹陷滩坝砂为例,针对压裂纵向改造程度低、有效裂缝长度和导流能力不足的难点,首先,通过分层地应力剖面确定、分层集中射孔优化和分层压裂临界施工排量优化,从而优化纵向压裂裂缝参数,提高长井段多薄层分层压裂纵向改造程度;然后,通过对裂缝参数、施工参数、支撑剂和低伤害压裂液体系的优选,实现层内支撑剂铺置优化,提高层内压裂改造程度。在滨438井区的分层压裂现场应用结果表明,实施分层压裂3个月,平均产油量是邻井常规笼统压裂产油量的2.2倍,充分说明了该方法的有效性。
[Abstract]:The beach dam sand reservoir has the characteristics of long longitudinal span, many thin layers, poor physical properties and strong heterogeneity. The conventional general fracturing effect is poor, the cost of stepwise fracturing is high, and the operation is complicated. Therefore, it is of great significance to develop the research on the optimization of stratified fracturing technology. Taking the beach bar sand in Dongying sag as an example, aiming at the difficulties of low degree of longitudinal reconstruction of fracturing, insufficient effective fracture length and conductivity, firstly, the determination of stratified in-situ stress profile, the optimization of stratified concentrated perforation and the optimization of critical displacement of stratified fracturing are carried out. In order to optimize the fracture parameters of longitudinal fracturing and to improve the degree of longitudinal fracturing in long well section, through the optimization of fracture parameters, operation parameters, proppant and low damage fracturing fluid system, the placement optimization of proppant is realized. Improve the degree of fracturing in the formation. The results of field application in Bin438 well area show that the average oil production is 2.2 times higher than that of general fracturing in adjacent wells for 3 months, which fully shows the effectiveness of this method.
【作者单位】：中国石化胜利石油工程有限公司井下作业公司;
【基金】：国家科技重大专项“低渗砂岩储层提高压裂裂缝复杂程度工艺技术研究”(2016ZX05006-002) 国家杰出青年科学基金项目“低渗与致密油气藏压裂酸化”(51525404)
【分类号】：TE357

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