新疆石油地质

›› 2013, Vol. 34 ›› Issue (2): 1-1.

• 论文 •    

有效耗水区间在东营凹陷地层中的确定及地质意义

郗凤琨   

  1. (中国石化 胜利油田分公司 地质科学研究院,山东 东营 257015)
  • 出版日期:2019-01-01 发布日期:1905-07-10

Determination of Effective Water Consumption Interval and Its Geologic Implication in Dongying Sag, Bohai Bay Basin

XI Fengkun   

  1. (Research Institute of Geological Sciences, Shengli Oilfield Company, Sinopec, Dongying, Shandong 257015, China)
  • Online:2019-01-01 Published:1905-07-10

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摘要： 沉积物在埋藏压实过程中，不仅发生矿物蚀变耗水作用，同时也发生地层压实排水作用和黏土矿物转化脱水作用。通过对东营凹陷深部地层压实排水量和黏土矿物转化脱水量的计算，将同深度段地层总增水量与耗水量进行对比，发现二者平衡深度约为2 500 m，其上地层以增水为主，其下地层以耗水为主，并确定东营凹陷深部地层耗水区间为2 500~3 500 m. 在有效耗水区间内，耗水作用可以改善储集层物性，增大油气储集空间，降低封闭流体压力，增大油气运聚动力差，有利于油气成藏。

Abstract: Sediment changes may include the water consumption of mineral alteration, the compaction drainage action and the dehydration from clay minerals transformation, etc. during the burial diagenesis and compaction. This paper calculates the water drainage from deep strata compaction and the dehydration from clay minerals transformation in Dongying sag, compares the total water growth rate and the total water consumption at the same depth intervals, and indicates that the balanced depth between them is about 2 500 m, above which the strata are dominated by water increase, below which by water consumption. The water consumption intervals in the deep strata of Dongying sag range from 2 500 m to 3 500 m. Within the effective intervals the reservoir quality can be improved, including enlarging oil?gas storage space, reducing closed fluid pressure, enhancing oil?gas accumulation power, etc. These are all favorable for oil?gas accumulation in this area

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