| 轮古地区古岩溶成像测井响应特征及其对岩溶发育的指示作用 |
| |
| 引用本文： | 傅海成,邹长春,肖承文,祁兴中,王儒安,赵丹颖,孙健.轮古地区古岩溶成像测井响应特征及其对岩溶发育的指示作用[J].中国岩溶,2015,34(2):136-146. |
| |
| 作者姓名： | 傅海成 邹长春 肖承文 祁兴中 王儒安 赵丹颖 孙健 |
| |
| 作者单位： | 中国石油勘探开发研究院/中国地质大学（北京）地下信息探测技术与仪器教育部重点实验室;中国地质大学（北京）地下信息探测技术与仪器教育部重点实验室;中国石油塔里木油田分公司;中国石油塔里木油田分公司;中国石油测井有限公司;中国石油测井有限公司;中国石油塔里木油田分公司 |
| |
| 基金项目： | 国家油气重大专项“油气测井重大技术装备”（2011ZX05020-008） |
| |
| 摘 要： | 塔里木盆地轮古地区奥陶系碳酸盐岩储层受多期构造运动及古岩溶作用的叠加改造,该地区古岩溶作用形成的溶洞、裂缝等次生孔隙是主要的油气储集空间。因此古岩溶发育研究是碳酸盐储层评价极为重要的研究内容。文章在对轮古地区奥陶系碳酸盐岩储层大量成像测井资料处理基础上,主要通过对溶蚀裂缝、溶洞的成像测井响应特征进行分析,总结古岩溶标志的成像测井响应规律。高导缝在成像测井图像上表现为褐黑色正弦曲线,溶蚀缝表现为裂缝图像边缘不平直,未充填溶洞在图像上表现为暗色的团块分布,对于全充填洞,可在成像测井图中见到层理等沉积现象。溶蚀程度的差异可根据成像测井资料上解释的裂缝及溶洞中角砾的多寡来度量。轮古西井区,其大溶洞中角砾已溶蚀掉,部分溶洞充填泥砂,表明溶蚀程度很高;轮古中部各井溶洞中的角砾还比较大,单产状裂缝溶洞的规模比轮古西井区小,溶洞溶蚀程度较弱;轮古东井区未见单产状小溶洞,仅见大溶洞的雏形或只有交叉缝和溶蚀裂缝。对区域大量成像测井识别的洞穴数据统计结果表明轮古地区奥陶系洞穴型岩溶储层的分布主要受表层岩溶作用控制。
|
| 关 键 词： | 轮古地区 碳酸盐岩储层 古岩溶 成像测井 溶洞 角砾 |
Characteristics of imaging logging response and indication of paleokarst development in Lungu area |
| |
| FU Hai-cheng,ZOU Chang-chun,XIAO Cheng-wen,QI Xing-zhong,WANG Ru-an,ZHAO Dan-ying and SUN Jian.Characteristics of imaging logging response and indication of paleokarst development in Lungu area[J].Carsologica Sinica,2015,34(2):136-146. |
| |
| Authors: | FU Hai-cheng ZOU Chang-chun XIAO Cheng-wen QI Xing-zhong WANG Ru-an ZHAO Dan-ying and SUN Jian |
| |
| Abstract: | The Ordovician carbonate reservoir in the Lungu area of Tarim basin has been reformed by the superimposition of multi-stage tectonic movement and karstification. Primary oil and gas storage space can be found in the secondary pore structures, such as caves and fractures, formed by paleokarstification. Evaluation of karstification is an important area of research for evaluation of carbonate reservoirs. Based on processing of a large set of imaging logging data from the Lungu area, and mainly through analysis of the imaging logging response of caves and fractures, karstification rules are determined for the area. In imaging logging, a high conductivity fracture often manifests as a brown-black sine curve, generally with higher continuity; a corrosion fracture generally corresponds to a sine curve with irregular edges; a unfilled cave appears as dark clumps with local light colored clumps; additionally, fully filled caves, bedding and other sedimentary phenomenon can be observed in the resulting imaging logging map. The different levels of karstification can be identified by fractures and breccias in caves, which are interpreted by imaging logging. In western Lungu,the breccias in some large caves have been completely corroded and were filled with mud and sand, indicating a high level of karstification in this area. In central Lungu region, where some caves have greater amounts of breccia, the size of the cave produced by the corrosion of a single strike fracture is clearly smaller than that in western Lungu. This indicates weaker karstification in central Lungu compared with the western region. In eastern Lungu, small caves have not been produced by the corrosion of single strike fractures, only proto-caves or cross cracks and karst fissures can be observed by imaging logging. Statistical analysis of the number of caves in Lungu area indicates that the distribution of cave reservoirs is mainly affected by epigenetic karst zones. |
| |
| Keywords: | |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《中国岩溶》浏览原始摘要信息 |
| 点击此处可从《中国岩溶》下载免费的PDF全文 |
|
