准噶尔盆地沙窝地地区岩性圈闭识别

Identification of lithologic traps in Shawodi area, Junggar Basin

中国石化江苏油田分公司地质科学研究院,江苏扬州 225009

Geology Research Institute, Jiangsu Oil Exploration Corporation, Yangzhou 225009, China

针对准噶尔盆地沙窝地(SWD)地区储层为岩性圈闭这一特点,进行了多种识别技术综合应用研究。首先利用沉积相分析和地震相分析技术,对SWD地区的砂体展布进行了描述;然后利用正、反演技术,对侏罗系三工河组二段的砂体进行了识别;由于SWD地区砂泥岩波阻抗差较小,用波阻抗识别砂体存在着多解性,因此,利用地震属性、谱分解、瞬时子波吸收等技术对砂体作了进一步识别,验证了波阻抗预测的结果;最后,利用综合研究结果对三工河组二段的岩性圈闭进行了识别,并结合区域地质和构造特征确定了2口井位,钻探后1口井获工业油流,1口井获低产油流,钻探结果与预测结果相吻合。

Many identification methods are researched to identify lithologic traps in the SWD area of Junggar Basin. First, the sand-body distribution is described by the analysis of sedimentary facies and seismic facies. Then, Identify the sandstone reservoirs interbeded in the second segment of Sangonghe formation based on the wave impedance analysis and the seismic inversion & version technology. Sand body identification for wave impedance has multi-solution, as the differential of wave impedance is smaller in the SWD area. Using to main technologies including seismic attribute, spectral decomposition and hydrocarbon detection. At last, verified the well position and produced the oil stream. The both results are inosculated completely.