CAJ | 학술논문

鄂尔多斯盆地苏里格气田西区盒8下亚段主力含气层段相的研究观点较多，不同认识导致各个沉积相域内砂体对比和预测存在着较大的差异，从而给勘探井位部署增加了难度。笔者在前人研究成果基础上，充分利用钻井、测井、岩心、地震、分析化验和野外露头等多种资料和手段，采用岩石学特征分析、岩心沉积构特征观察、古生物化石证据、研究区柳林成家庄野外露头沉积序列揭示、测井相特征和河流相地震特殊反射结构观察等多种研究手段和方法，对该区盒8下亚段的沉积相进行了详细论证、分析和描述。研究结果表明，辫状河沉积是苏里格西区盒8下亚段主要的相类型；干旱与潮湿气候的频繁交替变化，是导致砂体研究区目的层垂向砂体厚度大、非均质性强和砂体横向变化快的主控因素。
악이다사분지소리격기전서구합8하아단주력함기층단상적연구관점교다，불동인식도치각개침적상역내사체대비화예측존재착교대적차이，종이급감탐정위부서증가료난도。필자재전인연구성과기출상，충분이용찬정、측정、암심、지진、분석화험화야외로두등다충자료화수단，채용암석학특정분석、암심침적구특정관찰、고생물화석증거、연구구류림성가장야외로두침적서렬게시、측정상특정화하류상지진특수반사결구관찰등다충연구수단화방법，대해구합8하아단적침적상진행료상세론증、분석화묘술。연구결과표명，변상하침적시소리격서구합8하아단주요적상류형；간한여조습기후적빈번교체변화，시도치사체연구구목적층수향사체후도대、비균질성강화사체횡향변화쾌적주공인소。
The opinions to the sedimentary facies in the western Sulige gas field were so different that they lead to the big difficulty to forecast the sandbody distribution in exploration and development .We studied the sedimentary facies through adopting the techniques and methods of stone characteristics analysis ,sedimentary structure description ,and fossil observation ;revealed sedimentary sequences of outcrop from Chengjiazhuang based on the facies logging and seismic reflection related to fluvial facies researched by predecessors in the Lower He8 Member .The research results show that the braided river deposition is the main facies type of the Lower He 8 Member in Western Sulige Gas Field .In our opinion , the frequent climate change from dry to humid is the controlling factor ,which resulted in the large thickness of sandbody ,strong heterogeneity ,and lateral variation of reservoir .