昆北油田切12井区基岩油藏产能主控因素及高效开发实践

发布时间：2018-03-17 01:28

本文选题：基岩油藏　切入点：产能主控因素　出处：《油气地质与采收率》2017年06期 　论文类型：期刊论文

【摘要】：柴达木盆地昆北油田切12井区纵向上发育基岩油藏和不整合面上覆E_3~1砂砾岩油藏(简称E_3~1油藏)2种类型油藏,但彼此间不发育稳定隔夹层,具有统一油气系统。该区开发初期主要对E_3~1油藏进行注水开发,基岩油藏以试采评价为主。为实现对E_3~1油藏产能的有效接替,在基岩储层特征认识的基础上,归纳总结出岩性、裂缝发育程度和上覆油藏注水特征3个基岩油藏产能的主控因素,以此来确定该区水平井开发方式,并在开发实践中建立了块状油藏地质模型、制定了井位部署方案和形成了随钻跟踪技术。研究证实板岩与花岗岩均是有利储层,基岩顶部风化程度高、裂缝最发育,E_3~1油藏的注水开发实际上对基岩油藏完成了超前注水,产能主控因素的分析奠定了水平井高效开发的理论基础,从近3 a基岩油藏开发效果来看,在低油价背景下实现了少井高产,在柴达木盆地首次完成了针对基岩油藏的规模开发。
[Abstract]:There are two types of reservoirs, I. e., bedrock reservoir and ESP _ 3N _ 1 sandy gravel reservoir on the unconformity surface, developed vertically in Qian12 well area of Kun Bei Oilfield in Qaidam Basin, but no stable intercalation is developed between them. There is a unified oil and gas system. In the early stage of development, the E3DU 1 reservoir is mainly developed by water injection, and the bedrock reservoir is mainly evaluated by production test. In order to realize the effective replacement of the productivity of the ESP 3DU 1 reservoir, the lithology is summed up on the basis of the recognition of the characteristics of the bedrock reservoir. In order to determine the development mode of horizontal wells in this area, three main controlling factors of productivity of bedrock reservoir, such as the degree of fracture development and the characteristics of overlying reservoir water injection, are used to determine the development mode of horizontal wells in this area, and the geological model of block reservoir is established in the development practice. The plan of well location deployment and the formation of tracking technology while drilling have been established. It has been proved that slate and granite are both favorable reservoirs, that the weathering degree is high at the top of bedrock, and that the water injection development of the most developed fractured reservoir is actually completed by water injection to the bedrock reservoir. The analysis of the main factors of productivity control has laid the theoretical foundation for the efficient development of horizontal wells. From the view of the development effect of bedrock reservoirs in the past 3 years, the low oil price background has realized the low wells and high production. The scale development of bedrock reservoir was completed for the first time in Qaidam Basin.
【作者单位】：中国石油青海油田分公司勘探开发研究院;
【基金】：中国石油科技重大专项“柴达木盆地建设千万吨油气田综合配套技术研究”(2016E-0101,2016B-0303)
【分类号】：TE34

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