第38卷第6期 2017年12月
文章编号：10013873(2017)06063706
新疆石油地质
XINJIANG PETROLEUM GEOLOGY DOI: 10.7657/XJPG20170602
Vol.38,No.6 Dee.2017
雅克拉气藏白垩系旋回结构法小层划分对比
李宗宇，任宏，刘芳，肖红
（中国石化西北油田分公司雅克拉采气厂，新疆库车842017）
摘要：雅克拉白至系轰析气藏开发中后期水滤严重，稳产难度大，为提高采收率，精细挖潜刺余油，需对气蔗进行渠入研究，精细刻画小层对比格架，把砂体成因、地层层序等时对比及沉积相(微相)研究有机结合在一起，以沉积旋回的内部结构、旋回叠置和组合关系为突破口，通过建立岩心、常规测井以及他和度测井资料之间的岩电关系，识别超微旋回界面，开展精细小层划分对比，进面研究隔夹层展布及封档性等，并建立了5种剩余油分布模式，进一步优化开发层系。该方法较好地解决了“穿时性”、“砂对砂泥对泥”、"等厚努分"等间题，更逼适地下真实情况，在碎属岩油气藏开发中具有较大推广意义。
关键调：塔里木垒地；雅克拉气藏；白至系；亚格列木组；旋回结构；小层对比；剩余油分布
中图分类号：TE122.221
文献标识码：A
Stratigraphic Classification and Correlation with Cretaceous Cycle Structure Method in Yakela
Gas Reservoirs, Tarim Basin
LI Zongyu, REN Hong, LIU Fang, XIAO Hong
(Yakela Gas Production Plant, Northwest Oilfield Company, Sinopec, Kuqa, Xinjiang 842017, China)
Abstract: Cretaceous condensate gas reservoirs in Yakela condensate gas field are seriously flooded at the middlelate production stages and it is difficult to stabilize the production. To improve the recovery factor and enhance the remaining oil potential of the gas field, in-depth study on the gas reservoirs and detailed stratigraphic correlation are needed to be done. Based on the integrated study of sand body genesis, stratigraphic sequence isochronous correlation and sedimentary facies (microfacies), taking internal structure, cycle superimposition and cy-cle combination of sedimentary cycles as breakthrough, ultra-micro cycle interfaces are identified, detailed stratigraphic classification and comelation are carried out, the distribution and blocking properties of interlayers are studied and 5 pattems of remaining oil distribution are established to further optimize development layer series through establishing a relationship among core, conventional logging and saturation logging data, The method can solve the problems of diachronism, sandstone to sandstone & shale to shale, and equal thickness split and so on, which is much closer to the actual underground situation and has popularized significance in the development of clastic reservoirs
Keywords: Tarim basin; Yakela gas reservoir; Cretaceous; Yageliemu formation; cycle structure; stratigraphic correlation; remaining oil
distribution
在油气藏开发中，精细小层对比是地质研究的重要工作之-2。等时性对比是地层对比应遵循的基本原则，然而在传统小层对比中只是对地层的单一岩性“层状”对比，存在“等厚劈分”、“砂对砂，泥对泥”、“穿时现象"等问题"-12。1987年Vail和Wagoner提山了“层序地层学概念，认为构造运动、海面升降、沉积物供应和气候等因素控制相对海平面的升降变化，并影响地层层序发育模式及内部不同级次单位的分布13-14]。后发展为高分辨率层序地层学概念并得以推广，在沉积旋回对比的基础上附加了沉积动力学成因的概念5-23]。构型要素分析法主要运用于相变快的河流相构型研究中，从沉积成因角度在三维空间上划分不同层次的等时构型单元，研究其形态、规模、方向和
收稿日期：2017-01-18
修订日期：2017-09-29
基金项日：国家科技专项（2016Zx05053-014）
空间叠置关系7.921-2)，由于野外露头的规模局限性，实际应用中却未精细到韵律层。
韵律层划分主要依据沉积学及层序地层学，遵循相变规律，识别小层中单砂体的叠置关系，主要也是界面识别和砂体接触关系研究-1"。近十年，储集层划分精度逐步提高，开始精细到成因砂体和韵律层的划分，文献[12]在不同成因砂体识别的基础上进行单一河道识别，并划分储集层层次从地层段到交错层系的10个层次，地层对比模式也从传统的以沉积学和层序地层学为理论依据的单一的岩性对比、等时对比及等高程对比向相控砂体叠加模式和韵律变化的精细划分对比转化。
本文以层序地层学和沉积学为理论基础，讨论地
作者简介：李宗宇（1968-），男，重庆铜梁人，高级工程师，油气开发，（Tel)18999621301(E-mail)lizy.xbsj@sinopec.com 万方数据