Significant breakthroughs have been made in gas exploration of Permian volcanic reservoirs in the western Sichuan Basin, where Well YT1 and Well TF2 yielded commercial gas flow in tests. Nonetheless, the oil and gas exploration for the Permian volcanic reservoirs is generally in its initial stage. Very little data is available for reference, especially on the reservoir rock sensitivity and gas-water two-phase seepage characteristics. By using the core samples from Wells YT1 and TF2, experiments were conducted on rock sensitivity evaluation and gas-water two-phase seepage. The results show that the reservoirs are weak in velocity sensitivity, water sensitivity and salinity sensitivity. Reservoir rocks under formation conditions have weak porosity sensitivity to stress and moderate permeability sensitivity to stress. The porosity and permeability follow a good power function relationship with the effective overburden pressure, and the cumulative damage rate of porosity and permeability follows a good logarithmic function relationship with the effective overburden pressure. The relative permeability curves of reservoir are characterized by wide two-phase co-infiltration zone, high isotonic point saturation, and high relative permeability under isotonic point saturation. The reservoir rocks show strong hydrophilic characteristics. The experiment results are of guiding significance for the reservoir evaluation, reserves estimation and development planning, as well as the preparation of working fluids in drilling, completion, and reservoir stimulation of the Permian volcanic reservoirs in the western Sichuan Basin.
[an error occurred while processing this directive]
[1] 姜洪福, 师永民, 张玉广, 等. 全球火山岩油气资源前景分析[J]. 资源与产业, 2009, 11(3): 20-22.
JIANG Hongfu, SHI Yongmin, ZHANG Yuguang, et al.Potential of global volcanics-hosted oil-gas resources[J]. Resources & Industries, 2009, 11(3): 20-22.
[2] 邹才能, 赵文智, 贾承造, 等. 中国沉积盆地火山岩油气藏形成与分布[J]. 石油勘探与开发, 2008, 35(3): 257-271.
ZOU Caineng, ZHAO Wenzhi, JIA Chengzao, et al.Formation and distribution of volcanic hydrocarbon reservoirs in sedimentary basins of China[J]. Petroleum Exploration and Development, 2008, 35(3): 257-271.
[3] 屈洋, 刘庆. 松辽盆地北部安达凹陷中基性火山岩储层孔隙结构及渗流机理研究[J]. 天然气勘探与开发, 2018, 41(1): 69-73.
QU Yang, LIU Qing.Pore structures and seepage mechanisms of intermediate-basic volcanic reservoirs in Anda Sag, northern Songliao Basin[J]. Natural Gas Exploration and Development, 2018, 41(1): 69-73.
[4] 马新华, 杨雨, 张健, 等. 四川盆地二叠系火山碎屑岩气藏勘探重大发现及其启示[J]. 天然气工业, 2019, 39(2): 1-8.
MA Xinhua, YANG Yu, ZHANG Jian, et al.A major discovery in Permian volcanic rock gas reservoir exploration in the Sichuan Basin and its implications[J]. Natural Gas Industry, 2019, 39(2): 1-8.
[5] 何青林, 陈骁, 冉崎, 等. 四川盆地成都—简阳地区二叠系火山岩地震反射特征与岩相分布[J]. 天然气勘探与开发, 2019, 42(1): 35-41.
HE Qinglin, CHEN Xiao, Ran Qi, et al.Seismic-reflection characteristics and lithofacies-distribution prediction of Permian volcanic rocks, Chengdu-Jianyang area[J]. Natural Gas Exploration and Development, 2019, 42(1): 35-41.
[6] 谭杰, 周克明, 曾理, 等. 火山岩晶质及非晶质矿物组分定量分析方法——以四川盆地西部二叠系火山岩为例[J]. 天然气工业, 2022, 42(5): 24-33.
TAN Jie, ZHOU Keming, ZENG Li, et al.Quantitative analysis method for crystalline and amorphous components in volcanic rocks: A case study on Permian Volcanic Rocks in the western Sichuan Basin[J]. Natural Gas Industry, 2022, 42(5): 24-33.
[7] 文龙, 李亚, 易海永, 等. 四川盆地二叠系火山岩岩相与储层特征[J]. 天然气工业, 2019, 39(2): 17-27.
WEN Long, LI Ya, YI Haiyong, et al.Lithofacies and reservoir characteristics of Permian volcanic rocks in the Sichuan Basin[J]. Natural Gas Industry, 2019, 39(2): 17-27.
[8] 刘鑫, 夏茂龙, 吴煜宇, 等. 四川盆地永探1井二叠系火山碎屑熔岩储层特征[J]. 天然气勘探与开发, 2019, 42(4): 28-36.
LIU Xin, XIA Maolong, WU Yuyu, et al.Characteristics of Permian volcaniclastic lava reservoirs in Yongtan 1 well, Sichuan Basin[J]. Natural Gas Exploration and Development, 2019, 42(4): 28-36.
[9] 杨跃明, 杨雨, 文龙, 等. 四川盆地中二叠统天然气勘探新进展与前景展望[J]. 天然气工业, 2020, 40(7): 10-22.
YANG Yueming, YANG Yu, WEN Long, et al.New exploration progress and prospect of Middle Permian natural gas in the Sichuan Basin[J]. Natural Gas Industry, 2020, 40(7): 10-22.
[10] 国家能源局. 储层敏感性流动实验评价方法: SY/T 5358—2010[S]. 2010.
National Energy Administration.Formation damage evaluation by flow test: SY/T5358—2010[S]. 2010.
[11] 国家能源局. 覆压下岩石孔隙度和渗透率测定方法: SY/T 6385—2016[S]. 2017.
National Energy Administration.Porosity and permeability measurement under overburden pressure: SY/T6385—2016[S]. 2017.
[12] 周克明, 李农, 刘婷芝, 等. 高温高压气井产能模拟实验方法[J]. 天然气工业, 2021, 41(7): 63-72.
ZHOU Keming, LI Nong, LIU Tingzhi, et al.A simulation experiment method for HTHP gas well productivity[J]. Natural Gas Industry, 2021, 41(7): 63-72.
[13] 张文彪, 李洪玺, 代琤. 异常高压应力敏感性气藏开发动态预测研究[J]. 石油地质与工程, 2018, 32(2): 79-81.
ZHANG Wenbiao, LI Hongxi, DAI Cheng.Dynamic prediction of abnormal high-pressure gas reservoir with stress sensitivity[J]. Petroleum Geology and Engineering, 2018, 32(2): 79-81.
[14] 张永乾. 高温高压气藏渗流机理及水平井产能研究[D]. 成都: 西南石油大学, 2017.
ZHANG Yongqian.Research on the mechanism of penetration in gas reservoir under high temperature and high pressure and the productivity of horizontal well[D]. Chengdu: Southwest Petroleum University, 2017.
[15] 洪艳. 松南气田火山岩气藏单相渗流机理研究[J]. 吉林地质, 2015, 34(2): 17-23.
HONG Yan.Study on volcanic gas reservoir single-phase flow mechanism of Songnan gas field[J]. Jilin Geology, 2015, 34(2): 17-23.
[16] 朱华银, 胡勇, 韩永新, 等. 大庆深层火山岩储层应力敏感性研究[J]. 天然气地球科学, 2007, 18(2): 197-199.
ZHU Huayin, HU Yong, HAN Yongxin, et al.Study on stress sensitivity of deep volcanic reservoirs in Daqing[J]. Natural Gas Geoscience, 2007, 18(2): 197-199.
[17] 李程辉, 李熙喆, 高树生, 等. 碳酸盐岩储集层气水两相渗流实验与气井流入动态曲线——以高石梯—磨溪区块龙王庙组和灯影组为例[J]. 石油勘探与开发, 2017, 44(6): 930-938.
LI Chenghui, LI Xizhe, GAO Shusheng, et al.Experiment on gas-water two-phase seepage and inflow performance curves of gas wells in carbonate reservoirs: A case study of Longwangmiao Formation and Dengying Formation in Gaoshiti-Moxi block, Sichuan Basin, SW China[J]. Petroleum Exploration and Development, 2017, 44(6): 930-938.
[18] 中华人民共和国国家质量监督检验检疫总局, 中国国家标准化管理委员会. 岩石中两相流体相对渗透率测定方法: GB/T 28912—2012[S]. 2013.
General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China, Standardization Administration of the People’s Republic of China. Test method for two phase relative permeability in rock: GB/T 28912—2012[S]. 2013.
[19] 周克明, 张清秀, 王勤, 等. 利用分形模型计算气水相对渗透率[J]. 天然气工业, 2007, 27(10): 88-89.
ZHOU Keming, ZHANG Qingxiu, WANG Qin, et al.Calculation of gas and water relative permeability by the fractal model[J]. Natural Gas Industry, 2007, 27(10): 88-89.