摘要
W 22块为一非均质性较强的复杂断块油藏,含水上升快,产量递减迅速,经过二十多年的注水开发,目前已进入高含水期。论文从剩余油分布的地质控制因素入手,认为该区块的剩余油分布受断层、微构造和沉积微相控制。剩余油主要富集在河道砂体发育的正韵律水淹层上部,河道间湾及河口坝反韵律油层下部,开采程度较低的前三角洲亚相带的差油层。地质控制因素的分析研究为剩余油的进一步挖潜提供了依据。
W22 block is a complicated fault-block reservoir with sharp heterogeneity. Water-cut increases quickly,production decreases rapidly. Waterflooding for more than twenty years, At present it has been in high water-cut stage. Analyzing from geologic controlling factors, The article thinks that distribution of residual oil is controlled by fault, miniature structure as well as sedimentary micro-faces. It is considered that the concentration of residual oil distribution lie in the upper unflooded positive rhythm channel sand ,lower part of sand branch and mouth bar inverted layered reservoir and region of predelta sedimentary subfacies poor sandstones which is low in degree of reserve recovery. It provides reference to tapping next step.
出处
《内蒙古石油化工》
CAS
2008年第3期126-128,共3页
Inner Mongolia Petrochemical Industry
关键词
剩余油分布
断层
微构造
沉积微相
控制因素
Residual Oil Distribution
Faults
Miniature Structrue
Sedimentary Micro - faces
Controlling Factors
