塔里木板块塔中83井—16井区上奥陶统礁滩复合体储层结构

J4 ›› 2011, Vol. 17 ›› Issue (4): 577-585.

塔里木板块塔中83井—16井区上奥陶统礁滩复合体储层结构

王振宇，张云峰，杨红强，苏东坡，张丽娟，邓小杰，李越　

1. 西南石油大学资源与环境学院，成都 610500；2. 塔里木油田分公司勘探开发研究院，库尔勒 841000；
3. 中国科学院南京地质古生物研究所，南京 210008

收稿日期:2011-04-06 修回日期:2011-04-28 出版日期:2011-12-20 发布日期:2011-12-20
通讯作者: 李越，博士，研究员，主要从事古生物学、沉积学研究；
作者简介:王振宇，博士，副教授，主要从事沉积学、油气储层研究；E-mail：wzhy6408@163.com
基金资助:
中科院创新工程方向性项目（KZCX2-YW-Q05-01）资助

Reservior Structures of the Upper Ordovician Reef Complexes in Tazhong 83-16 Well Area, Tarim Block

WANG Zhen-yu， ZHANG Yun-feng， YANG Hong-qiang， SU Dong-po， ZHANG Li-juan， DENG Xiao-jie， LI Yue

1. Resource and environment school; Southwestern University of Petroleum; Chengdu 610500, China;
2. Exploration and Development Research Institute; Tarim Oilfield Company; Korla 841000, China;
3. Nanjing Institute of Geology and Palaeontology; Chinese Academy of Sciences; Nanjing 210008, China

Received:2011-04-06 Revised:2011-04-28 Online:2011-12-20 Published:2011-12-20
Contact: Li Yue, Professor；E-mail: yueli@nigpas.ac.cn

摘要/Abstract

摘要：

塔里木板块塔中I号坡折带的塔中83井—塔中16井区上奥陶统良里塔格组碳酸盐岩地层钻遇厚度170~300 m，这套镶边
台地型沉积相一般展示为4~5个礁滩复合体叠加旋回，岩相以及之后的岩溶、构造作用是控制圈闭单元形成的决定因素。根
据岩芯、薄片及测井的各类指标分析，储集空间类型可划分为溶洞、孔洞、粒内溶孔、铸模孔、粒间溶孔、晶间溶孔、生物
格架孔、裂缝等类型；据孔隙结构特征及结合方式可确认孔洞型、裂缝-孔洞型、裂缝型3种比例相当的构建方式。孔隙度、
渗透率相对较高的有利储层平面上主要分布在靠近塔中I号坡折带的台缘区，与礁滩体建造密集带相吻合。台地边缘外带具
有良好的原始岩相基础，经历多期溶蚀改造且充填程度低，储层类型以裂缝-孔洞型和孔洞型为主，属于I，Ⅱ类厚度大的优
质储层。而台地边缘内带沿塔中12井—塔中16井区储层类型以裂缝型为主，但后期充填程度较高，多属Ⅱ，Ⅲ类储层。

关键词: 储层结构；礁滩复合体；良里塔格组；上奥陶统；塔中I号坡折带；塔里木板块

Abstract:

Carbonate sequences of the upper Ordovician Lianglitag Formation along the Tazhong 83-Tazhong 16 well blocks，
Slope Break I，Tarim Block is 170-300 m thick and notable as reservoirs of oil-gas．This suite of sedimentary facies from the
platform margin is generally shown as overlapping of reef complexes with 4-5 cycles. Lithological facies as well as enhanced karst and tectonic action onward are considerable factors controlling the trap formation．Based on the analysis of drilling cores, thin sections and logging parameters, types of reservoir space are recognized as cave，intragranularly dissolved pores，intercrystalline dissolved pores，moldic pore，biologic dorsal pore，organic framework pore and micro-fracture．The features of the void structures as well as their associations are catalogued as vug，fracture-vug, and fracture configuration types, respectively，and are in similar abundance. Nevertheless， the perspective of reservoirs with good conditions of porosity and permeability are favorable for spatial distribution from the platform margin of the Slope-break I. Such a model is subtly consistent with reef-bank complexes. Outer setting of the platform margin has ideal lithologiolal facies that experienced multiple reformation phases and show weak filling.The reservoir pattern shows that fracture-vug and vug types are dominant. Therefore, we consider it a potential area for highquality type I andⅡ reservoirs. However, inner setting of the platform margin along the Tazhong 12-Tazhong 16 well blocks is dominated by fractures and high lithological filling during later periods that resulted in type Ⅱ and Ⅲreservoir.

Key words: Reservoirs, Reef complexes, Lianglitag Formation, Upper Ordovician, Slope-break I in Tazhong, Tarim Block, NW
China

中图分类号:

P624.6

王振宇，张云峰，杨红强，苏东坡，张丽娟，邓小杰，李越　. 塔里木板块塔中83井—16井区上奥陶统礁滩复合体储层结构[J]. J4, 2011, 17(4): 577-585.

WANG Zhen-yu， ZHANG Yun-feng， YANG Hong-qiang， SU Dong-po， ZHANG Li-juan， DENG X. Reservior Structures of the Upper Ordovician Reef Complexes in Tazhong 83-16 Well Area, Tarim Block[J]. J4, 2011, 17(4): 577-585.