Gas bearing and compressibility evaluation of shale reservoir in Dawuba Formation of Qianshuidi 1 Well in Guizhong-Nanpanjiang area
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摘要: 桂中—南盘江地区的黔水地1井在直井钻探过程中获得了稳定的页岩气流,取得了石炭系打屋坝组良好的海相页岩气发现。基于钻井、录井、测井、测试资料分析,通过对打屋坝组页岩储层岩相、有机地球化学、物性、裂缝发育程度和含气性等开展综合研究,解释了研究区页岩储层的含气性及可压性。研究发现: ①打屋坝组为一套从碳酸盐斜坡相的下斜坡亚相过渡至台盆相的巨厚泥页岩层系,其中打屋坝组一段上部—三段中下部发育好—优质烃源岩,天然裂缝发育,气测全烃最大值63.41%,解吸气量平均值1.08 m3/t,具备良好的页岩气生成条件和资源潜力; ②主要含气层段的脆性矿物含量为31%~94%,泊松比平均值为0.31,体积弹性模量平均值为27.2 GPa,破裂压力为29.7~48.5 MPa。综合评价显示该套地层具备较好的破裂潜力和裂缝保持能力,大规模体积压裂容易形成复杂裂缝网络,该套地层压力较高,具备压裂形成工业产能的条件,可作为下一步勘探开发的目标层段。Abstract: The stable shale gas flow was obtained during vertical well drilling of Qianshuidi 1 Well in Guizhong-Nanpanjiang area, meaning the good marine shale gas was discovered in Carboniferous Dawuba Formation. Based on the drilling, logging, well logging, analysis and testing data, the authors in this paper comprehensively studied the lithofacies, organic geochemistry, physical properties, fracture development and gas bearing of Dawuba Formation shale reservoir, and explained the gas bearing and compressibility of shale reservoir in the study area. The results show that: ① Dawuba Formation consists of a set of huge thick shale system which is from the lower slope subfacies of carbonate slope facies to the huge thick shale series of platform basin facies, and Good to high-quality source rock are well developed in the middle lower part of the third member and the upper part of the first member, with developed natural fractures. The maximum value of total hydrocarbon in gas logging is 63.41%, and the average value of desorption gas is 1.08 m3/t, with good shale gas generation conditions and resource potential. ② The total content of brittle minerals in the main gas bearing intervals is 31%~94%, and the average Poisson's ratio is 0.31. The average bulk modulus of elasticity is 27.2 GPa, and the fracture pressure is between 29.7 MPa and 48.5 MPa. This set of strata has good fracture potential and fracture retention ability, which means the complex fracture networks would be easily formed under large-scale volumetric fracture. Besides, the set of strata has high pressure and meets the conditions for fracturing to form industrial production capacity, making it a target layer for further exploration and development.
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Key words:
- Qianshuidi 1 Well /
- Dawuba Formation /
- shale gas /
- gas bearing /
- compressibility
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[1] 何利,宋春彦,谭钦银,等.川东南武隆地区五峰组—龙马溪组页岩气形成条件及富集区分析[J].海相油气地质,2017,22(3):47-56.
[2] He L,Song C Y,Tan Q Y,et al.Accumulation conditions and enrichment zones of shale gas in Wufeng-Longmaxi Formation in Wulong area of southeast Sichuan basin[J].Marine Origin Petroleum Geology,2017,22(3):47-56.
[2] 黄仁春,魏祥峰,王强.四川盆地东南缘丁山地区页岩气成藏富集的关键控制因素[J].海相油气地质,2017,22(2):25-30.
[4] Huang R C,Wei X F,Wang Q.Key factors of shale gas accumulation in Dingshan area of southeastern Sichuan Basin[J].Marine Origin Petroleum Geology,2017,22(2):25-30.
[3] 姜振学,宋岩,唐相路,等.中国南方海相页岩气差异富集的控制因素[J].石油勘探与开发,2020,47(3):617-628.
[6] Jiang Z X,Song Y,Tang X L,et al.Controlling factors of marine shale gas differential enrichment in southern China[J].Petroleum Exploration and Development,2020,47(3):617-628.
[4] 邱楠生,冯乾乾,腾格尔,等.川东南丁山地区燕山期—喜马拉雅期差异构造-热演化与页岩气保存[J].石油学报,2020,41(12):1610-1622.
[8] Qiu N S,Feng Q Q,Borjigin T,et al.Yanshanian-Himalayan differential tectono-thermal evolution and shale gas preservation in Dingshan area,southeastern Sichuan Basin[J].Acta Petrolei Sinica,2020,41(12):1610-1622.
[5] 郭旭升,胡东风,李宇平,等.涪陵页岩气田富集高产主控地质因素[J].石油勘探与开发,2017,44(4):481-491.
[10] Guo X S,Hu D F,Li Y P,et al.Geological factors controlling shale gas enrichment and high production in Fuling shale gas field[J].Petroleum Exploration and Development,2017,44(4):481-491.
[6] 易积正,王超.四川盆地焦石坝地区龙马溪组海相页岩储层非均质性特征[J].石油实验地质,2018,40(1):13-19.
[12] Yi J Z,Wang C.Differential pore development characteristics in various shale lithofacies of Longmaxi Formation in Jiaoshiba area,Sichuan Basin[J].Petroleum Geology & Experiment,2018,40(1):13-19.
[7] 卢树藩,何犇,杜胜江.黔南代页1井下石炭统打屋坝组页岩气地质条件及勘探前景[J].中国地质调查,2016,3(4):6-11.
[14] Lu S F,He B,Du S J.Geological conditions and exploration prospect of shale gas in Dawuba Formation of Lower Carboniferous of Daiye-1 well in southern Guizhou Province[J].Geological Survey of China,2016,3(4):6-11.
[8] 苑坤,方欣欣,王婷,等.黔南坳陷下石炭统打屋坝组页岩气地质条件及勘探前景[J].地质论评,2020,66(S1):115-116.
[16] Yuan K,Fang X X,Wang T,et al.Accumulation conditions and exploration potential of shale gas of Dawuba Formation,Southern Guizhou depression[J].Geological Review,2020,66(S1):115-116.
[9] 郭军,陈相霖,赵训林,等.桂中—南盘江地区黔水地1井钻井关键技术[J].断块油气田,2021,28(3):423-427.
[18] Guo J,Chen X L,Zhao X L,et al.Key drilling technologies for well Qianshuidi 1 in Guizhong-Nanpanjiang area[J].Fault-Block Oil & Gas Field,2021,28(3):423-427.
[10] 陈相霖,苑坤,林拓,等.四川垭紫罗裂陷槽西北缘(黔水地1井)发现上古生界海相页岩气[J].中国地质,2021,48(2):661-662.
[20] Chen X L,Yuan K,Lin T,et al.Discovery of shale gas within Upper Paleozoic marine facies by Qian Shuidi-1 well in the northwest of Yaziluo rift trough,Sichuan Province[J].Geology in China,2021,48(2):661-662.
[11] 余川,聂海宽,曾春林,等.四川盆地东部下古生界页岩储集空间特征及其对含气性的影响[J].地质学报,2014,88(7):1311-1320.
[22] Yu C,Nie H K,Zeng C L,et al.Shale reservoir space characteristics and the effect on gas content in Lower Palaeozoic erathem of the eastern Sichuan Basin[J].Acta Geologica Sinica,2014,88(7):1311-1320.
[12] 张晓明,石万忠,徐清海,等.四川盆地焦石坝地区页岩气储层特征及控制因素[J].石油学报,2015,36(8):926-939,953.
[24] Zhang X M,Shi W Z,Xu Q H,et al.Reservoir characteristics and controlling factors of shale gas in Jiaoshiba area,Sichuan Basin[J].Acta Petrolei Sinica,2015,36(8):926-939,953.
[13] 李玉坤,林俊丞,张广杰,等.地应力变化与油井套管挤毁规律研究[J].石油机械,2017,45(8):54-60.
[26] Li Y K,Lin J C,Zhang G J,et al.Research on collapse of oil well casing under the variation of ground stress[J].China Petroleum Machinery,2017,45(8):54-60.
[14] 王璞,王成虎,王洪,等.利用孔壁竖向裂缝方位数据分析沂沭断裂带的地应力场特征[J].地震地质,2020,42(6):1316-1334.
[28] Wang P,Wang C H,Wang H,et al.Analysis of in-situ stress parameters of Yishu fault zone based on orientation of ditf in BHTV image[J].Seismology and Geology,2020,42(6):1316-1334.
[15] 商恩俊. 昆北油田基岩储层裂缝特征及其对开发的影响[D].唐山:华北理工大学,2020.
[30] Shang E J.Fracture Characteristics of Bedrock Reservoir in Kunbei Oilfield and Its Influence on Development[D].Tangshan:North China University of Science and Technology,2020.
[16] 苗凤彬,彭中勤,王传尚,等.雪峰隆起西缘湘张地1井牛蹄塘组页岩含气性特征及控制因素[J].地球科学,2019,44(11):3662-3677.
[32] Miao F B,Peng Z Q,Wang C S,et al.Gas-bearing capacity and controlling factors of Niutitang formation shale in well XZD-1,Western Margin of Xuefeng uplift[J].Earth Science,2019,44(11):3662-3677.
[17] 何建华,丁文龙,王哲,等.页岩储层体积压裂缝网形成的主控因素及评价方法[J].地质科技情报,2015,34(4):108-118.
[34] He J H,Ding W L,Wang Z,et al.Main controlling factors of fracture network formation of volume fracturing in shale reservoirs and its evaluation method[J].Geological Science and Technology Information,2015,34(4):108-118.
[18] 吴晶晶,张绍和,曹函,等.湘西北下寒武统牛蹄塘组页岩气储层可压裂性评价[J].中南大学学报:自然科学版,2018,49(5):1160-1168.
[36] Wu J J,Zhang S H,Cao H,et al.Fracability evaluation of shale gas reservoir in Lower Cambrian Niutitang formation,northwestern Hunan[J].Journal of Central South University:Science and Technology,2018,49(5):1160-1168.
[19] Sondergeld C H,Newsham K E,Comisky J T,et al.Petrophysical considerations in evaluating and producing shale gas resources[C]//Proceedings of SPE Unconventional Gas Conference.Pittsburg:SPE,2010.
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