塔里木碳酸盐岩油水层有机地球化学判识方法

APPLICATION OF ORGANIC CHEMISTRICAL METHOD IN DISCRIMINATING OIL-WATER STRATA IN TARIM CARBONATE ROCKS

陈传平 孙伟琳 袁志华 苏秀芳 弥积良 黄克难

Chen Chuanping Sun Weilin Yuan Zhihua Su Xiufang Mi Jiliang Huang Kenan

当碳酸盐岩储层的含油饱和度 >50%时,即为油层>10%时划分为水层。对中重质油而言,利用岩石热解和电测解释可获得碳酸盐岩岩芯的含油率和岩石孔隙度,通过计算获得岩石的视含油饱和度,从而判识储层的性质;轻质油的视含油饱和度对判断储层性质已无实际意义,主要依据储岩有机溶剂抽提物的气相色谱特征来进行油水层的识别。塔里木盆地应用此方法判识的油水层已经被钻井所证实。

When oil content saturation in carbonate rock reservoirs is>50%,it is called oil layer; when oil content saturation is <10%,it is called water layer. In terms of medium oil, oil bearing rate in rock cores of carbonate rock and rock porosity can be gained by employing rock pyrolysis and interpretation of electrical logging, by calculating visible oil content saturation in the rocks and then reservoir nature can be discriminated. Visible saturation in light oil has no real meaning to discriminate reservoir nature. The discrimination of oil-water strata are mainly based on the gas chromatographic characteristics from organic solvent extractions. Oil-water layers discriminated in Tarim basin with this method have been proved by well drilling.

10.11743/ogg20020324