地层干酪根有机酸与储层次生孔隙的关系

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RELATION OF ORGANIC ACID GENERATED BY KEROGEN TO SECONDARY POROSITY OF RESERVOIR

Laboratory Centre, Research Institute of Petroleum Exploration and Development, CNPC, Beijing 10083

摘要: 本文论述了干酪根有机酸在成岩演化和储层次生孔隙研究中的价值。认为与干酪根有机酸有成因关系的次生孔隙,是干酪根累积已产酸与矿物作用的结果;同时提出用地层干酪根有机酸的残酸相对总产量(用单位重量干酪根残酸产量,地层有机酸含量,地层厚度3要素之积表示)及其Σ双元酸/Σ单元酸比值(简称Σ双/Σ单)预测储层次生孔隙发育层段的新思路。
- 干酪根 /
- 累积产酸量 /
- 残余产酸量 /
- 地层有机酸相对总产量 /
- Σ双元酸／Σ单元酸 /
- 地层有机酸溶蚀矿物的能力
Abstract: The significance of organic acids generated by kerogen on diagenesis and secondary porosity is discussed in the paper. It is considered that those secondary porosity genetically related with kerogen-derived organic acids are resulted from the reactions of organic acids yielded by and accumulated in kerogen to minerals in rocks; meanwhile it is suggested that the residual acids generated by kerogen in formation relative to their total yield (expressed by the product of per unit weight yield of residual acids by kerogen, the content of organic acids and thickness of formation), the ratio of Σ binary-acid and Σ mono-acid can be employed to predict the intervals with well-developed secondary porosity.

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