陕甘宁盆地延长统区域裂缝的形成及其油气地质意义

详细信息

收稿日期: 1998-03-30

刊出日期: 1999-11-15

Origin of the regional fracturing in Yanchang epoch, Shanganning basin,significance for geology of oil and gas

Received Date: 30 March 1998

Publish Date: 15 November 1999

摘要: 陕甘宁盆地三叠系延长统由于受到水平挤压和隆起等多期应力作用,形成了4 组区域裂缝,其中东西向和北西向裂缝以及南北向和北东向裂缝分别属于共轭剪切裂缝,它们分别在燕山期北西西向挤压和喜马拉雅期北北东向挤压运动中形成。由于受地层非均质性影响,该区中北部主要发育东西向和南北向两组裂缝,而南部主要发育北西向和北东向两组裂缝。区域裂缝系统控制了延长统储集层渗透性的差异,对油气运移及开发方案的确定有重要作用。
- 区域裂缝 /
- 油气地质 /
- 延长统 /
- 陕甘宁盆地
Abstract: The Yanchang Epoch of Triassic in Shanganning basin underwent multiple compressive and uplifting deformations,which led to four sets of regional fracturing.The EW,NW striking and NS,NE striking fractures constitute a conjugate shear system,responding the Yanshanian NWW compression and Himalayan NNE compression.Because of the heterogeneity of rocks,EW and NS striking fractures were developed in the mid north area,whereas NW and NE striking fractures were developed in the south.These fractures are major controls over the permeability of oil reservoirs,therefore significant for exploration and planning of oil and gas resources in the area.
- regional fracturing /
- geology of oil and gas /
- Yanchang Epoch /
- Shanganning basin

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