吉林中浅层探井水平井储层保护技术研究
发布时间：2019-07-09 17:43
【摘要】：吉林油田松南中浅层勘探的目的层多数为低孔低渗类型,油层孔渗条件差,储层孔喉细小,探井水平井钻井过程中水敏水锁损害严重,油藏勘探开发效率低。另外该区地层水矿化度在10000ppm-60000ppm变化,油层保护难度大,现场所用的KCL聚合物钻井液体系防水锁防水敏性能有待进一步提高。在本文研究过程中首先通过地层矿物组分分析,对该区进行了地层敏感性预测与评价并分析了吉林油田中浅层探井水平井储层主要损害方式以及机理,即水锁损害和水敏损害为主。第二针对吉林油田中浅层探井水平井实际,提出了钻井液油层保护技术对策特别是防水锁防水敏损害技术对策,形成了钻井液防水敏防水锁技术。第三为了降低水敏水锁损害,本文合成了新型防水锁剂FCS和广谱暂堵剂GPJ,室内实验评价结果表明FCS能够有效降低油水界面张力,广谱暂堵剂能有效抑制地层水化;并通过配伍性研究形成了KCL防水锁防水敏钻井液体系,室内动态污染实验评价结果表明该钻井液体系渗透率恢复率为93.94%,有效保护了储层。第四本文建立了吉林油田中浅层水平井油层保护技术,形成了相应的储层损害评价方法与模型,即水锁损害定量评价模型、水锁损害岩心流动实验评价和水敏损害CST诊断法,采用所建立方法评价结果表明形成的钻井液体系有效减少了水敏水锁损害。
[Abstract]:Most of the target layers in Songnan middle and shallow layer exploration in Jilin Oilfield are low porosity and low permeability, the porosity and permeability conditions of the reservoir are poor, the pore throat of the reservoir is small, the damage of water sensitive water lock is serious in the drilling process of horizontal wells, and the efficiency of reservoir exploration and development is low. In addition, the salinity of formation water in this area changes in 10000ppm-60000ppm, so it is difficult to protect the reservoir. The waterproofing locking and water sensitivity of KCL polymer drilling fluid system used in the field needs to be further improved. In the course of this study, through the analysis of formation mineral components, the formation sensitivity is predicted and evaluated, and the main damage modes and mechanisms of horizontal wells in middle and shallow exploration wells in Jilin Oilfield are analyzed, that is, water lock damage and water sensitivity damage. Secondly, according to the practice of horizontal wells in middle and shallow exploration wells in Jilin Oilfield, the technical countermeasures of drilling fluid reservoir protection, especially the technical countermeasures of waterproofing locking and water sensitive damage prevention, are put forward, and the drilling fluid waterproof sensitive and waterproofing locking technology is formed. Thirdly, in order to reduce the damage of water sensitive water lock, a new waterproof locking agent FCS and broad spectrum temporary blocking agent GPJ, were synthesized in laboratory. The results show that FCS can effectively reduce the interfacial tension between oil and water, and the broad spectrum temporary blocking agent can effectively inhibit formation hydration. The KCL waterproof lock waterproofing sensitive drilling fluid system was formed through the study of compatibility. The laboratory dynamic pollution test results show that the permeability recovery rate of the drilling fluid system is 93.94%, which effectively protects the reservoir. Fourth, the reservoir protection technology of medium and shallow horizontal wells in Jilin Oilfield is established, and the corresponding reservoir damage evaluation methods and models are formed, that is, the quantitative evaluation model of water lock damage, the experimental evaluation of water lock damage core flow and the CST diagnosis method of water sensitive damage. The evaluation results show that the drilling fluid system can effectively reduce the damage of water sensitive water lock.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE254
本文编号：2512320
[Abstract]:Most of the target layers in Songnan middle and shallow layer exploration in Jilin Oilfield are low porosity and low permeability, the porosity and permeability conditions of the reservoir are poor, the pore throat of the reservoir is small, the damage of water sensitive water lock is serious in the drilling process of horizontal wells, and the efficiency of reservoir exploration and development is low. In addition, the salinity of formation water in this area changes in 10000ppm-60000ppm, so it is difficult to protect the reservoir. The waterproofing locking and water sensitivity of KCL polymer drilling fluid system used in the field needs to be further improved. In the course of this study, through the analysis of formation mineral components, the formation sensitivity is predicted and evaluated, and the main damage modes and mechanisms of horizontal wells in middle and shallow exploration wells in Jilin Oilfield are analyzed, that is, water lock damage and water sensitivity damage. Secondly, according to the practice of horizontal wells in middle and shallow exploration wells in Jilin Oilfield, the technical countermeasures of drilling fluid reservoir protection, especially the technical countermeasures of waterproofing locking and water sensitive damage prevention, are put forward, and the drilling fluid waterproof sensitive and waterproofing locking technology is formed. Thirdly, in order to reduce the damage of water sensitive water lock, a new waterproof locking agent FCS and broad spectrum temporary blocking agent GPJ, were synthesized in laboratory. The results show that FCS can effectively reduce the interfacial tension between oil and water, and the broad spectrum temporary blocking agent can effectively inhibit formation hydration. The KCL waterproof lock waterproofing sensitive drilling fluid system was formed through the study of compatibility. The laboratory dynamic pollution test results show that the permeability recovery rate of the drilling fluid system is 93.94%, which effectively protects the reservoir. Fourth, the reservoir protection technology of medium and shallow horizontal wells in Jilin Oilfield is established, and the corresponding reservoir damage evaluation methods and models are formed, that is, the quantitative evaluation model of water lock damage, the experimental evaluation of water lock damage core flow and the CST diagnosis method of water sensitive damage. The evaluation results show that the drilling fluid system can effectively reduce the damage of water sensitive water lock.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE254
【参考文献】
相关期刊论文 前1条
1 王昌军;王正良;罗觉生;;南海西部油田低渗透储层防水锁技术研究[J];石油天然气学报;2011年09期
，本文编号：2512320
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