Research of karst reservoirs characteristics and paleokarst development pattern of the Ordovician Yingshan formation north-slope of Tazhong, Tarim basin area
-
摘要: 塔中北斜坡奥陶系鹰山组碳酸盐岩古岩溶发育，油气资源丰富，具有广阔的勘探开发前景。本次利用岩石化学分析、岩芯钻井、地震测井及成像测井资料，对岩溶储层发育规律及岩溶缝洞发育模式进行研究。认为：鹰一段和鹰二段发育质纯厚层灰岩地层，属强岩溶层组，溶蚀孔，溶蚀裂缝及溶洞均发育，后期古岩溶作用是该区油气聚集的主要场所。垂向岩溶缝洞系统主要发育在鹰山组顶面以下0~50 m及80~180 m范围。同时，溶洞在该区发育，洞穴型岩溶是该区优质岩溶储层，钻井过程常伴有放空、水漏失现象。结合古地貌特征，建立了ZG18~ZG22井区古岩溶缝洞系统发育模式，为岩溶储层预测及勘探开发井位部署提供地质依据。Abstract: The study area is situated in the northern slopes of Tazhong paleo-uplift, Tarim basin, where paleokarstic features are massively developed in the carbonate rocks of Yingshan Formation of the Ordovician, with abundant oil and gas resources and a broad prospect for the exploration and development of the natural resources. The development of karst reservoir and the patterns of solution cavities and fissures were studied, based on the data derived from rock chemical analysis, core drilling, and down-hole seismic and imagining logs. The results show that thick-layered pure limestone of the top two members of Yingshan Formation belongs to strong karst suite, where corrosion hole, karst fissure and cave are developed. Post-tectonic karstification has made the region become the main place for oil-gas accumulation. The results also show that vertical karst caves and solution fissures mainly occur in the depth ranges of 0 ~ 50 m and 80 ~180 m below the Yingshan Formation, of which the karst caves substantially constitute the oil-gas reservoir in this area. This was confirmed by the venting and leaking phenomena during the well drilling. In combination with the characteristics of paleo-geomorphology, we established the development patterns of paleokarstic cave system in the area between wells ZG18 and ZG22,in order to provide a concrete geological basis for karst reservoir prediction and well exploration.
-
Key words:
- karst reservoir /
- karst pattern /
- reservoir space /
- Ordovician /
- north-slope of Tazhong area
-
[1] 金之钧，蔡立国.中国海相油气勘探前景、主要问题与对策［J］.石油与天然气地质,2006,27(6):722-730. [2] 周新源，杨海军，邬光辉，等.塔中大油气田的勘探实践与勘探方向［J］.新疆石油地质,2009,30(2)：149-152. [3] 杨海军，韩剑发，孙崇浩，等. 塔中北斜坡奥陶系鹰山组岩溶型储层发育模式与油气勘探［J］.石油学报，2011,32（2）：199-205. [4] 陈景山,李忠,王振宇,等.塔里木盆地奥陶系碳酸盐岩古岩溶作用与储层分布［J］.沉积学报,2007,25(6):858-868. [5] 马红强,王恕一,雍洪,等.塔里木盆地塔中地区奥陶系碳酸盐岩埋藏溶蚀特征［J］.石油实验地质.2010,32(5):434-441. [6] 曲海洲，王振宇，杨海军，等. 礁滩相碳酸盐岩岩溶作用及其对孔隙分布的控制:以塔中东部上奥陶统良里塔格组为例［J］.石油勘探与开发，2013,40（5）：552-558. [7] 潘文庆,刘永福,Dickson J A D,等.塔里木盆地下古生界碳酸盐岩热液岩溶的特征及地质模型［J］.沉积学报,2009,27(5):983-994. [8] 罗亚南，罗新生，张云峰，等.塔中北斜坡下奥陶统鹰山组热液岩溶特征及发育模式［J］.重庆科技学院学报（自然科学版），2012,14（3）：19-22. [9] 邬光辉,李启明,张宝收,等.塔中Ⅰ号断裂坡折带构造特征及勘探领域［J］.石油学报,2005,26(1): 27-30. [10] 韩剑发,梅廉夫,杨海军,等.塔里木盆地塔中奥陶系天然气的非烃成因及其成藏意义［J］.地学前缘,2009,16(1):314-325. [11] 张庆玉,梁彬,曹建文,等. 塔里木盆地轮古西地区奥陶系古潜山岩溶作用机理与发育模式［J］.石油实验地质,2015,37(1):1-7. [12] 康玉柱.再论塔里木盆地古生代油气勘探潜力:纪念沙参2井油气勘探重大突破20周年［J］.石油与天然气地质,2004,25(5):479-483. [13] 阮壮，于炳松，李朝晖，等.塔北与塔中地区奥陶系碳酸盐岩储层成因对比研究［J］.沉积与特提斯地质，2010,30（3）：84-89. [14] 王振宇,杨飞,杨海军,等. 中古15井区礁滩体储集层主控因素分析［J］. 新疆石油地质,2013,34(5):538-541. [15] 邓兴梁，张庆玉，梁彬，等.塔中Ⅱ区奥陶系鹰山组岩溶古地貌恢复方法研究［J］.中国岩溶，2015,34(2):154-158. -
点击查看大图
计量
- 文章访问数: 1640
- HTML浏览量: 353
- PDF下载量: 1063
- 被引次数: 0
下载:
