Mechanical Mechanism of Karst Cave Collapse in Carbonate Reservoirs

doi:10.7657/XJPG20230515

Abstract

Abstract:

To determine the collapse mechanism of karst caves in carbonate reservoirs, through stress field simulation, and based on orthogonal two-dimensional sections of the karst caves, a two-dimensional mechanical model was established to simulate the stress distribution characteristics of the carbonate karst caves under negative pressure. By multiple linear regression on controlling variables, a karst cave collapse model coupling with the stress function of the critical fracture point was constructed to predict the relationships among cave collapse and stress, depth and width. It is found that the most important factors influencing cave rock burst and collapse are overlying formation pressure, reservoir compressive strength and flexural strength. For two caves superimposed vertically, when their vertical distance is less than 0.3 times the cave radius, the partition between the two caves breaks, leading to the cave connection. During the collapse and rupture, the cave height changes obviously, while the width changes slightly.

Key words: carbonate, reservoir, karst cave, stress, collapse, rockburst, inversion

CLC Number:

TE122.2

ZHANG Jiyue, KANG Zhihong, CHEN Huaxin, KANG Zhijiang. Mechanical Mechanism of Karst Cave Collapse in Carbonate Reservoirs[J]. Xinjiang Petroleum Geology, 2023, 44(5): 618-625.

Figures/Tables 5

References 42

[1]	马永生, 黎茂稳, 蔡勋育, 等. 中国海相深层油气富集机理与勘探开发:研究现状、关键技术瓶颈与基础科学问题[J]. 石油与天然气地质, 2020, 41(4):655-672.
	MA Yongsheng, LI Maowen, CAI Xunyu, et al. Mechanisms and exploitation of deep marine petroleum accumulations in China:Advances,technological bottlenecks and basic scientific problems[J]. Oil & Gas Geology, 2020, 41(4):655-672.
[2]	LOUCKS R G. Paleocave carbonate reservoirs:Origins,burial-depth modifications,spatial complexity,and reservoir implications[J]. AAPG Bulletin, 1999, 83:1795-1834.
[3]	刘军, 陈强路, 王鹏, 等. 塔里木盆地顺南地区中下奥陶统碳酸盐岩储层特征与主控因素[J]. 石油实验地质, 2021, 43(1):23-33.
	LIU Jun, CHEN Qianglu, WANG Peng, et al. Characteristics and main controlling factors of carbonate reservoirs of Middle-Lower Ordovician,Shunnan area,Tarim basin[J]. Petroleum Geology & Experiment, 2021, 43(1):23-33.
[4]	LOUCKS R G, MESCHER P K, MCMECHAN G A. Three-dimensional architecture of a coalesced,collapsed-paleocave system in the Lower Ordovician Ellenburger group, Central Texas[J]. AAPG Bulletin, 2004, 88:545-564. doi: 10.1306/12220303072
[5]	康志宏, 鲁新便, 唐湘蓉, 等. 塔河油田奥陶系古洞穴垮塌体地震反射结构与识别[J]. 新疆地质, 2014, 32(4):540-545.
	KANG Zhihong, LU Xinbian, TANG Xiangrong, et al. Seismic reflection structure and identification of Ordovician ancient cave collapse body in Tahe oilfield[J]. Xinjiang Geology, 2014, 32(4):540-545.
[6]	李文科, 张研, 张宝民, 等. 川中震旦系—二叠系古岩溶塌陷体成因、特征及意义[J]. 石油勘探与开发, 2014, 41(5):1-10.
	LI Wenke, ZHANG Yan, ZHANG Baomin, et al. Genesis,characteristics and significance of Aurora system-Permian paleokarst collapse[J]. Petroleum Exploration and Development, 2014, 41(5):1-10 doi: 10.1016/S1876-3804(14)60001-X
[7]	丁晓琪, 张哨楠, 潘怀孝, 等. 鄂尔多斯盆地大牛地气田奥陶系“垮塌”型岩溶储层发育规律[J]. 石油与天然气地质, 2016, 37(2):210-217.
	DING Xiaoqi, ZHANG Shaonan, PAN Huaixiao, et al. Development law of Ordovician “collapsed” karst reservoirs in Daniudi gas field in Ordos basin[J]. Oil & Gas Geology, 2016, 37(2):210-217.
[8]	刘春成, 杨克绳. 地层溶蚀垮塌构造:苏桥潜山[J]. 断块油气田, 2006, 13(5):1-3.
	LIU Chuncheng, YANG Kesheng. Collapse structure with formation dissolution:Suqiao buried hill[J]. Fault-Block Oil & Gas Field, 2006, 13(5):1-3.
[9]	丁晓琪, 刘鑫, 祁壮壮, 等. 碳酸盐岩孔洞型储层分层次储集空间表征:以鄂尔多斯盆地大牛地中奥陶统马家沟组马五7为例[J]. 石油实验地质, 2021, 43(4):689-696.
	DING Xiaoqi, LIU Xin, QI Zhuangzhuang, et al. Reservoir space characterization of vuggy carbonate reservoirs with multiple scales: A case study of Ma 5-7 interval,Middle Ordovician Majiagou formation,Daniudi area,Ordos basin[J]. Petroleum Geology & Experiment, 2021, 43(4):689-696.
[10]	钱一雄, 陈跃, 陈强路, 等. 塔中西北部奥陶系碳酸盐岩埋藏溶蚀作用[J]. 石油学报, 2006, 27(3):47-52. doi: 10.7623/syxb200603010
	QIAN Yixiong, CHEN Yue, CHEN Qianglu, et al. Burial dissolution of Ordovician carbonate rocks in northwest central and northwestern towers[J]. Acta Petrolei Sinica, 2006, 27(3):47-52. doi: 10.7623/syxb200603010
[11]	牛玉静. 缝洞型碳酸盐岩油藏溶洞储集体岩溶塌陷结构特征研究[D]. 北京: 中国地质大学(北京), 2012.
	NIU Yujing. Study on the characteristics of collective karst collapse structure in fractured cave carbonate oil reservoir[D]. Beijing: China University of Geosciences (Beijing), 2012.
[12]	郑兴平, 沈安江, 寿建峰, 等. 埋藏岩溶洞穴垮塌深度定量图版及其在碳酸盐岩缝洞型储层地质评价预测中的意义[J]. 海相油气地质, 2009, 14(4):55-59.
	ZHENG Xingping, SHEN Anjiang, SHOU Jianfeng, et al. Quantitative map of collapse depth of buried karst cave and its significance in geological evaluation and prediction of carbonate fracture-cave reservoir[J]. Marine Origin Petroleum Geology, 2009, 14(4):55-59.
[13]	王超, 张强勇, 刘中春, 等. 缝洞型油藏溶洞临界垮塌深度预测模型及其应用[J]. 中国石油大学学报(自然科学版), 2015, 39(1):103-110.
	WANG Chao, ZHANG Qiangyong, LIU Zhongchun, et al. Critical collapse depth prediction model of fractured reservoir and its application[J]. Journal of China University of Petroleum(Natural Science Edition), 2015, 39(1):103-110.
[14]	张长建, 吕艳萍, 张振哲. 塔里木盆地塔河油田西部斜坡区中下奥陶统古岩溶洞穴发育特征[J]. 石油实验地质, 2022, 44(6):1008-1 017.
	ZHANG Changjian, LÜ Yanping, ZHANG Zhenzhe. Features of Middle-Lower Ordovician paleo-karst caves in western slope area,Tahe oil field, Tarim basin[J]. Petroleum Geology & Experiment, 2022, 44(6):1008-1 017.
[15]	赵晨君. 塔河油田碳酸盐岩缝洞型油藏溶洞垮塌条件研究[D]. 北京: 中国地质大学(北京), 2020.
	ZHAO Chenjun. Study on cave collapse conditions of carbonate fracture-cave reservoir in Tahe oilfield[D]. Beijing: China University of Geosciences (Beijing), 2020.
[16]	吕海涛, 韩俊, 张继标, 等. 塔里木盆地顺北地区超深碳酸盐岩断溶体发育特征与形成机制[J]. 石油实验地质, 2021, 43(1):14-22.
	LÜ Haitao, HAN Jun, ZHANG Jibiao, et al. Development characteristics and formation mechanism of ultra-deep carbonate fault-dissolution body in Shunbei area,Tarim basin[J]. Petroleum Geology & Experiment, 2021, 43(1):14-22.
[17]	宁超众, 孙龙德, 胡素云, 等. 塔里木盆地哈拉哈塘油田奥陶系缝洞型碳酸盐岩储层岩溶类型及特征[J]. 石油学报, 2021, 42(1):15-32. doi: 10.7623/syxb202101002
	NING Chaozhong, SUN Longde, HU Suyun, et al. Karst types and characteristics of Ordovician fractured carbonate reservoirs in Harahatang oilfield,Tarim basin[J]. Acta Petrolei Sinica, 2021, 42(1):15-32. doi: 10.7623/syxb202101002
[18]	刘铁雄, 隆威, 胡丽乐. 超声波在灰岩模拟材料强度测量中的应用[J]. 交通科学与工程, 2013, 29(1):27-31.
	LIU Tiexiong, LONG Wei, HU Lile. Application of ultrasonic waves in strength measurement of limestone simulation materials[J]. Traffic Science and Engineering, 2013, 29(1):27-31.
[19]	刘晶晶, 毛毳, 魏荷花, 等. 塔河油田奥陶系缝洞充填序列及其测井响应[J]. 新疆石油地质, 2021, 42(1):46-52.
	LIU Jingjing, MAO Cui, WEI Hehua, et al. Ordovician fracture-cavity filling sequence and its logging responses in Tahe oilfield[J]. Xinjiang Petroleum Geology, 2021, 42(1):46-52.
[20]	张旭东, 薛承瑾, 张烨. 塔河油田托甫台地区岩石力学参数和地应力试验研究及其应用[J]. 石油天然气学报, 2011, 33(6):132-134.
	ZHANG Xudong, XUE Chengjin, ZHANG Ye. Experimental study on rock mechanical parameters and in-situ stress in Tofutai area of Tahe oilfield and their application[J]. Journal of Oil and Gas Technology, 2011, 33(6):132-134.
[21]	王鹏昊, 汤良杰, 邱海峻, 等. 塔里木盆地西北地区岩石力学格架及其地质意义[J]. 吉林大学学报(地球科学版), 2012, 42(3):101-110.
	WANG Penghao, TANG Liangjie, QIU Haijun, et al. Rock mechanicas framework and its geological implication in northwest Tarim basin,China[J]. Journal of Jilin University(Earth Science Edition), 2012, 42(3):101-110.
[22]	李军, 唐博超, 韩东, 等. 断控缝洞型油藏储集体发育特征及其连通关系:以塔河油田托甫台地区T单元为例[J]. 新疆石油地质, 2022, 43(5):572-579.
	LI Jun, TANG Bochao, HAN Dong, et al. Characteristics and connectivity of fault-controlled fractured-vuggy reservoirs:A case study of Unit T in Tuofutai area,Tahe oilfield[J]. Xinjiang Petroleum Geology, 2022, 43(5):572-579.
[23]	周文, 闫长辉, 王世泽, 等. 油气藏现今地应力场评价方法及其应用[M]. 北京: 地质出版社, 2007:25-26.
	ZHOU Wen, YAN Changhui, WANG Shize, et al. Current in-situ stress field evaluation method and its application in oil and gas reservoirs[M]. Beijing: Geological Publishing House, 2007:25-26.
[24]	高梦霓, 赵亚溥. 若干弹性力学问题解的唯一性定理[J]. 中国科学:物理学力学天文学, 2020, 50(8):56-89.
	GAO Mengni, ZHAO Yapu. The uniqueness theory for solving several elastic problems[J]. Science in China:Physics Mechanics Astronomy, 2020, 50(8):56-89.
[25]	何祖清, 李晓益, 龙武, 等. 考虑温度影响的碳酸盐岩储层应力敏感实验研究[J]. 成都理工大学学报(自然科学版), 2021, 48(5):626-631.
	HE Zuqing, LI Xiaoyi, LONG Wu, et al. Stress-sensitive experimental study of carbonate reservoir considering temperature influence[J]. Journal of Chengdu University of Technology(Natural Science Edition), 2021, 48(5):626-631.
[26]	雷川, 陈红汉, 苏奥, 等. 方解石充填物对于深层古岩溶洞穴保存的独特意义:以塔河地区奥陶系为例[J]. 沉积学报, 2016, 34(5):842-852.
	LEI Chuan, CHEN Honghan, SU Ao, et al. The unique significance of calcite filling for the preservation of deep ancient karst caves:A case study of Ordovician in Tahe area[J]. Acta Sedimentology Sinica, 2016, 34(5):842-852.
[27]	谢和平, 彭瑞东, 鞠杨, 等. 岩石破坏的能量分析初探[J]. 岩石力学与工程学报, 2005, 24(15):2603-2 608.
	XIE Heping, PENG Ruidong, JU Yang, et al. Preliminary study on energy analysis of rock failure[J]. Chinese Journal of Rock Mechanics and Engineering, 2005, 24(15):2603-2608.
[28]	陶振宇. 高地应力区的岩爆及其判别[J]. 人民长江, 1987, 18(5):25-32.
	TAO Zhenyu. Rock bursts in high geostress zones and their discrimination[J]. Yangtze River, 1987, 18(5):25-32.
[29]	徐俊帅, 徐金明, 涂齐亮. 基于地应力和岩体强度的岩爆预判[J]. 中国地质灾害与防治学报, 2018, 29(5):52-58.
	XU Junshuai, XU Jinming, TU Qiliang. Rock burst prediction based on in-situ stress and rock mass strength[J]. Chinese Journal of Geological Hazard and Control, 2018, 29(5):52-58.
[30]	邱道宏, 李术才, 张乐文, 等. 基于隧洞超前地质探测和地应力场反演的岩爆预测研究[J]. 岩土力学, 2015, 36(7):2034-2 040.
	QIU Daohong, LI Shucai, ZHANG Lewen, et al. Research on rock burst prediction based on tunnel advanced geological exploration and in-situ stress field inversion[J]. Rock and Soil Mechanics, 2015, 36(7):2034-2 040.
[31]	肖繁, 李刚, 胡明兵, 等. 基于最大主应力判据的深埋巷道岩爆预测[J]. 中国钨业, 2016, 31(1):35-41.
	XIAO Fan, LI Gang, HU Mingbing, et al. Prediction of rock burst in deep buried roadway based on maximum principal stress criterion[J]. China Tungsten Industry, 2016, 31(1):35-41.
[32]	侯哲生, 龚秋明, 孙卓恒. 锦屏二级水电站深埋完整大理岩基本破坏方式及其发生机制[J]. 岩石力学与工程学报, 2011, 30(4):727-732.
	HOU Zhesheng, GONG Qiuming, SUN Zhuoheng. The basic failure mode and occurrence mechanism of deep buried intact Dali rock in Jinping II hydropower station[J]. Chinese Journal of Rock Mechanics and Engineering, 2011, 30(4):727-732.
[33]	WHITE E L, WHITE W B. Dynamics of sediment transport in limestone caves[J]. National Speleothem Society Bulletin, 1968, 30:266-269.
[34]	鲁新便, 蔡忠贤. 缝洞型碳酸盐岩油藏古溶洞系统与油气开发:以塔河碳酸盐岩溶洞型油藏为例[J]. 石油与天然气地质, 2010, 31(1):22-27.
	LU Xinbian, CAI Zhongxian. Fracture-cave carbonate reservoir paleokarst system and oil and gas development:Take the Tahe carbonate karst cave reservoir as an example[J]. Oil & Gas Geology, 2010, 31(1):22-27.
[35]	陈洪凯, 梁丹, 董平. 岩溶洞穴土质盖层稳定性分析方法及应用[J]. 地下空间与工程学报, 2016, 12(2):546-552.
	CHEN Hongkai, LIANG Dan, DONG Ping. Stability analysis method and application of karst cave soil cover[J]. Chinese Journal of Underground Space and Engineering, 2016, 12(2):546-552.
[36]	宁超众, 胡素云, 李勇, 等. 深层与露头碳酸盐岩岩溶洞穴对比及类比:以塔里木盆地哈拉哈塘油田奥陶系良里塔格组古岩溶洞穴与美国德克萨斯州Longhorn近现代岩溶洞穴为例[J]. 天然气地球科学, 2020, 31(12):1700-1 716.
	NING Chaozhong, HU Suyun, LI Yong, et al. Comparison and analogy of deep and outcrop carbonate karst caves:A case study of the ancient karst caves of the Ordovician Lianglitag formation in the Harahatang oilfield in the Tarim basin and the modern karst caves of Longhorn,Texas,USA[J]. Natural Gas Geoscience, 2020, 31(12):1700-1 716.
[37]	宁超众, 胡素云, 潘文庆, 等. 塔里木盆地哈拉哈塘地区奥陶系良里塔格组古地貌与岩溶洞穴特征[J]. 石油与天然气地质, 2020, 41(5):985-995.
	NING Chaozhong, HU Suyun, PAN Wenqing, et al. Paleogeomorphology and karst cave characteristics of the Ordovician Lianglitag formation in the Harahatang area of the Tarim basin[J]. Oil & Gas Geology, 2020, 41(5):985-995.
[38]	康志宏, 陈琳, 鲁新便, 等. 塔河岩溶型碳酸盐岩缝洞系统流体动态连通性研究[J]. 地学前缘, 2012, 19(2):110-120.
	KANG Zhihong, CHEN Lin, LU Xinbian, et al. Study on fluid dynamic connectivity of karst carbonate fracture cave system in Tahe oilfield[J]. Earth Science Frontiers, 2012, 19(2):110-120.
[39]	康志宏, 吴铭东. 利用层序地层学恢复岩溶古地貌技术:以塔河油田6区为例[J]. 新疆地质, 2003, 21(3):290-292.
	KANG Zhihong, WU Mingdong. Technology of recovering ancient geomorphy through sequence stratigraphy:A case study in Tahe 6th reservoir,Tarim basin[J]. Xinjiang Geology, 2003, 21(3):290-292.
[40]	胡文革. 塔里木盆地塔河油田潜山区古岩溶缝洞类型及其改造作用[J]. 石油与天然气地质, 2022, 43(1):43-53.
	HU Wenge. Ancient karst cave types and their transformation in Qianshan district,Tahe oilfield,Tarim basin[J]. Oil & Gas Geology, 2022, 43(1):43-53.
[41]	钟世航, 孙宏志, 李术才, 等. 隧道及地下工程施工中岩溶裂隙水及断层、溶洞等隐患的探查、预报[J]. 岩石力学与工程学报, 2012, 31(增刊1):3298-3327.
	ZHONG Shihang, SUN Hongzhi, LI Shucai, et al. Detection and prediction of karst fracture water,faults,karst caves and other hidden dangers in tunnel and underground engineering construction[J]. Chinese Journal of Rock Mechanics and Engineering, 2012, 31(Supp.1): 3298-3327.
[42]	谢树庸. 岩溶区四大工程地质问题综述[J]. 贵州水力发电, 2001, 16(4):85-87.
	XIE Shuyong. Review of four major engineering geological problems in karst area[J]. Guizhou Hydroelectric Power, 2001, 16(4):85-87.