摘要
根据 4口井岩心观察和建立的测井地质模型 ,对辽河茨榆坨油田茨 4 1断块沙三段 3 7口井进行了层序和体系域划分。共划分了 5个层序 ,6个层序界面 ,1 5个体系域。以体系域为单位分别作出了砂体和沉积相展布图。砂体发育多寡次序为层序 、层序 、层序 、层序 、层序 。对同一层序不同的体系域而言 ,LST砂体厚度大 ,长度长 ,但宽度窄 ,砂岩分选、磨圆差、粘土含量多 ,故物性差。TST砂体厚度薄、面积大 ,岩石粒度细 ,物性差。 HST砂体厚度一般但宽度较大 ,砂岩分选磨圆好 ,粘土含量低 ,物性好 ,是该区主力产油层。
On the basis of a well logging model established by core observations for 4 wells, the sequences and system tracts are divided for 37 wells in Es 3 of faulted block Ci 41 of Ciyutuo oilfield, and 5 sequences, 6 sequence boundaries and 15 tracts are identified Distributary maps are made for both sandbodies and sedimentary facies by using tracts as units The order of sandbody growth is sequence Ⅱ, Ⅲ, Ⅰ, Ⅳ and Ⅴ For different tracts in a given sequence, the LST sandbody is thicker, longer but narrower, with a poor sorting and roundness and a high clay content, so its physical property is also bad; TST sandbodies is thinner,with big area and fine grain, so its physical property is bad; the HST sandbodies is general in thickness but bigger in width, with good sorting and roundness and lower clay content, so its physical property good, which shows that it is the main oil producing zone in the region
出处
《江汉石油学院学报》
CSCD
北大核心
2000年第3期40-44,共5页
Journal of Jianghan Petroleum Institute
