准噶尔西北缘红山嘴地区克上组辫状河三角洲沉积-储层耦合关系与综合定量评价  

Coupling relationship of sedimentation-reservoir and comprehensive quantitative evaluation of braided river delta facies in Upper Karamay Formation, Hongshanzui area, northwestern margin of Junggar Basin

作　　者：高阳 刘文峰[3] 于兴河[2] 杨新涛[3] GAO Yang;LIUWenfeng;YU Xinghe;YANG Xintao(Beijing Sunshine Geo-Tech Co.,Ltd.,Beijing 100083,China;School of Energy Resources,China University of Geosciences,Beijing 100083,China;No.1 Oil Production Plant,Xinjiang Oilfield Company,PetroChina,Karamay 834000,Xinjiang,China)

机构地区：[1]北京阳光杰科科技股份有限公司,北京100080 [2]中国地质大学(北京)能源学院,北京100083 [3]中国石油新疆油田分公司采油一厂,新疆克拉玛依834000

出　　处：《中国地质》2020年第4期971-984,共14页Geology in China

基　　金：国家自然科学基金项目(41472091)资助。

摘　　要：综合岩心、薄片、分析测试资料厘定辫状河三角洲不同相带储层特征及控制因素,选取孔隙度、含砂率、优势砂厚、优势砂岩分层系数及杂基含量作为评价参数,基于灰色关联法确定权重、拐点法确定分类阈值对储层进行综合定量评价。结果表明辫状河三角洲下平原地区由于储层物性好且优势砂岩(粗砂岩)占比高而Ⅰ类储层发育;三角洲上平原地区砂体发育但以砾岩沉积为主,杂基含量高而储层质量差,多为Ⅱ类储层;三角洲前缘地区正韵律特征显著,中、粗砂岩储层质量要优于细砂岩,但优势砂岩发育规模有限,因此多以Ⅱ类、Ⅲ类储层为主。该成果可为复杂砂砾岩储层的定量评价提供借鉴。Core observation, thin section identification and data test were applied to analyzing the characteristics and qualitycontrolling factors of reservoirs in braided river delta. 5 parameters of porosity, ratio of sandbody, effective sandbody thickness,stratification coefficient of effective sandbody and matix content were chosen to evaluate the reservoir quantitatively, and gray correlation method was used to determine the weight coefficient and make critical point analysis to confirm the threshold value of various reservoirs. The results show that the lower delta plain is mainly classified as Type Ⅰ reservoir due to its good reservoir physical property and well-development of effective sandbody, while, in the upper delta plain, conglomerates of high matix content and poor physical property are assigned to typeⅡreservoir. The reservoir quality in delta front varies as its remarkable grain rhythm,with good quality in medium and coarse sandstone and poor quality in fine sandstone. And a limited development scale of the effective sandbody causes the delta front to be more likely recognized as Type Ⅱ and type Ⅲ reservoir. The results can provide reference for the quantitative evaluation of complex conglomerate reservoirs.

关 键 词：辫状河三角洲 沉积作用 储层评价 克上组 红山嘴地区 准噶尔 

分 类 号：TE111.3[石油与天然气工程—油气勘探]