他拉哈—常家围子地区储层形成的主控因素——以葡萄花油层为例

MAIN CONTROLLING FACTORS OF RESERVOIR FORMING IN TALAHA-CHANGJIAWEIZI AREA--TAKING PUTAOHUA RESERVOIR AS AN EXAMPLE

他拉哈一常家围子地区分布的储层主要为低一特低渗储层，并在一定面积内获得了工业油流。搞清他拉哈一常家围子地区储层形成的主要控制因素，对进一步寻找高丰度的储量区块具有重要意义。通过偏光显微镜、电子显微镜和流体包裹体等微观技术结合储层粒度和沉积相的宏观研究，认为他拉哈一常家围子地区葡萄花油层为典型的低一特低渗透储层，其形成的主控因素主要与复杂的成岩作用、沉积物粒度、沉积相带有关。虽然研究区的储层曾经被溶蚀作用改造过，次生孔隙较发育，但是强烈的压实作用和胶结作用使第二期流体活动中后期储层物性进一步变差，最终形成了低一特低渗透储层。

The reservoirs in Talaha-Changjiaweizi area are mainly low and super low permeability reservoirs with commercial oil flow in certain area. To make clear the main controlling factors of reservoir forming in Talaha- Changjiaweizi area is of great significance for locating blocks with high reserves abundance. Through microscopic technology including polarized light microscope, electron microscope and fluid inclusion, combined with macrovisual study on reservoir grain size and sedimentary facies, this paper considers that Putaohua oil layer in Talaha- Changjiaweizi area belongs to typical low and super low permeability reservoir, whose controlling factors of reservoir forming is related to complex diagenesis, sediment size and sedimentary facies belt. The reservoir in studied area was reformed by denudation and had well developed secondary tation weakened the reservoir physical property in middle-later porosity. However, intense compaction and cemensecond stage of fluid flow, therefore, low and super low permeability reservoir formed finally.