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夏9井区八道湾组油藏为特低渗砂砾岩构造岩性油藏。1991年探明石油地质储量377.5万吨,有效孔隙度为15.5%,有效渗透率为6.8mD。2006年采用反七点260m井网井距注水开发,生产至2009年呈现平面产能差异大,含水率高(70%),动用状况差等矛盾。通过开展油藏地质与工程研究,在夏9井区开展了“分区分层开发政策”研究,实施了以优化注水,面积调驱为主、储层改造为辅的措施,实施后油藏油量绝对递减上年的16.3%下降至当年的-3.2%,后期每年递减保持在10%以内。同时利用井间电位监测技术验证了水流优势通道,利用全普剩余油测井技术证实了油层与顶部的水层连通,明确了油井高含水治理方向,形成一套适合该区开发模式,为同类低渗高含水期油藏开发提供了借鉴。
The Badaowan Formation reservoir in Xia 9 well is a lithologic oil reservoir with ultra-low permeability conglomerate structure. 1991 proven oil geological reserves of 3775,000 tons, the effective porosity of 15.5%, the effective permeability of 6.8mD. In 2006, the company adopted the anti-seven-point 260m well-to-well spacing waterflooding development. From 2009 to the present, production contradictions such as large difference in plane capacity, high water content (70%) and poor utilization status have emerged. Through the study of reservoir geology and engineering, the “Study on the Policy of Layering and Layering Development” has been carried out in Xia 9 well area. The measures of optimizing water flooding and area control and flooding are mainly implemented and reservoir reconstruction is supplemented. After oil recovery, The absolute decline in oil reserves decreased from 16.3% in the previous year to -3.2% in the current year, while the decline in the latter part of the year kept below 10%. At the same time, we use the crosswell potential monitoring technique to validate the channel of water flow. Utilizing the generalized residual oil well logging technology to confirm the connection between the oil layer and the top of the water layer, clarify the direction of high water cut for oil well and form a set of suitable development models for this area Low permeability and high water cut reservoir development provides a reference.