非构造裂缝的发育特征及成因机制

非构造裂缝作为油气良好的运移通道及有利的储渗空间 ,广泛发育于不同岩性的各类储层中 ,为油气生产作出贡献。对现今发现的各种非构造裂缝进行了综合研究 ,并依据形成主控因素的不同 ,把非构造裂缝划分为表生裂缝、收缩裂缝、溶蚀裂缝、缝合线、差异压实裂缝、压裂缝、冰冻裂缝及与重力滑塌有关的裂缝 8种类型。通过对各类裂缝的几何形态、发育特征的描述 ,对其形成环境、分布及成因机制进行了分析。该研究结果可以更好地为各类储层孔渗结构及运储性能 ,尤其是碳酸盐岩、低孔低渗等储层的研究提供理论依据。

Development characteristics and genetic mechanism of the untectonic fracture

The untectonic fractures are the proper migrational pathways and gathering spaces for oil and gas and widely developed in various reservoirs with different lithology. The different untectonic fractures founded by now were researched. According to their main control factors, the untectonic fractures can be divided into 8 kinds including hypergene crack, shrinkage crack, solution fracture, stylotite, differential compaction fractures, water compaction, frost and gravity slumping fracture. The geometric shapes and development characteristics were described.The forming circumstance, distribution and genetic mechanisms of fractures were analyzed. The untectonic fractures can be taken as a scientific research direction. The results of this research can provide the theoretical base for studying the carbonate, low-permeable and low-pore reservoirs.