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鄂尔多斯盆地储集层物性断裂对超低渗油气藏的控制作用
引用本文:邸领军.鄂尔多斯盆地储集层物性断裂对超低渗油气藏的控制作用[J].石油勘探与开发,2006,33(6):667-670.
作者姓名:邸领军
作者单位:中国石油长庆油田公司勘探开发研究院,710021
基金项目:中国石油长庆油田公司油气勘探科技项目
摘    要:在鄂尔多斯盆地的野外地质调查和钻井岩心观察中,发现砂岩中发育大量的雁行状和X共轭状节理、裂缝、微裂缝以及局部断裂,以“超稳定地块”为前提的传统构造学说无法对此做出合理的解释。研究发现,基底断裂及后期构造活动衍生的一系列剪切变形所产生的储集层物性断裂对油气的控制不容忽视。鄂尔多斯盆地中,所谓“超低渗透”是指基质渗透率,不能代表地层总渗透率。储集层中剪切、挤压等构造应力产生的节理以及沿这些微破裂派生的溶蚀孔缝形成良好物性区带才是油气相对高产的主要原因。因此,在寻找勘探靶区时应重视构造因素对成岩作用、酸性流体输导、次生溶孔形成等的控制作用。图5参9

关 键 词:鄂尔多斯盆地  超低渗透  基底断裂  物性断裂  基质渗透率
文章编号:1000-0747(2006)06-0667-04
收稿时间:11 16 2005 12:00AM
修稿时间:2005-11-162006-07-20

Controlling of petrophysical fractures on extra-low permeability oil and gas reservoirs in Ordos Basin
DI Ling-jun.Controlling of petrophysical fractures on extra-low permeability oil and gas reservoirs in Ordos Basin[J].Petroleum Exploration and Development,2006,33(6):667-670.
Authors:DI Ling-jun
Affiliation:Exploration & Development Research Institute of PetroChina Changqing Oilfield Company, Shaanxi 710021, China
Abstract:In geological survey and core observation in Ordos Basin, structures as echelon joints, X conjugated joint.s, fractures, micro-fractures and local ruptures were found well developed in the reservoir sandstones. It cannot be explained by the traditional tectonics theory based on Ultra-steady Block. The tectonic movement direction, the petrophysical property of sandstone, and the oil and gas distribution were subjected to the succe.ssive activities of deep and big faults in the basin basement. The regional tectonic stress field also influences them. The low permeability reservoir reflected by the matrix does not represent the real permeability of the reservoirs. The oil and gas distribution is .subjected to the reservoir petrophysical fractures, reflected by the features of a series of shear deformation derived from the base ruptures and late tectonic activities. The emphasis should be put on understanding how tectonic factors control the diagenesis, the acidic liquid transporting, and the formation of secondary solution pores in the future exploration.
Keywords:Ordos Basin  extra-low permeability  basement rift  petrophysical fracture  matrix permeability
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