Taking shale gas platform well groups inter-well interference factors as the research object, using numerical well test analysis technology, the degree of impact of different reservoir matrix permeability, fracturing parameters, well spacing, activation intensity and other parameters on inter-well interference are studied. On this basis, the pressure distribution characteristics of shale gas horizontal wells at different production times were grasped, and the degree of impact of inter-well interference on gas wells’ EUR was clarified, and well spacing optimization was formed that comprehensively considered gas wells’ EUR and well-controlled geological reserve recovery factor analytical method. The results show that when the natural fractures are not developed and the artificial fracture network between wells is not communicated, the propagation range of pressure waves outside the reconstruction area is limited, and the interference intensity between well groups of shale gas platform well groups is generally weak. The pressure drop degree is the largest in the fractured zone and around. When optimizing well spacing, it is necessary to consider not only whether there is pressure interference response between wells, but also the intensity of pressure interference; the more natural fractures develop and the greater the range of fracturing reformation, the more obvious the interference between wells, and optimization well spacing should take into account the development of natural fractures and the impact of fracturing reconstruction range; affected by inter-well interference, the EUR of gas wells increases with the increase in well spacing, but the increase gradually decreases, and the recovery rate decreases with the increasing well spacing. It is necessary to optimize the well spacing based on the geological engineering characteristics of the platform well group, comprehensively considering the gas wells’ EUR and the well-controlled geological reserves recovery factor.
Keywords:Shale gas
;
Well groups
;
Interwell interference test
;
Intensity of excitement
;
Optimizing well spacing
FAN Huaicai, ZHANG Jian, YUE Shengjie, HU Haoran. Analysis of influencing factors of interwell interference in shale gas well groups and well spacing optimization. Natural Gas Geoscience[J], 2022, 33(4): 512-519 doi:10.11764/j.issn.1672-1926.2021.11.005
WANG S F, DONG D Z, WANG Y M, et al. A comparative study of the geological feature of marine shale gas between China and the United States[J].Natural Gas Geoscience,2015,26(9):1666-1678.
YANG Z H, HAN Z Y, TENGER, et al. Characteristics of Wufeng-Longmaxi formations shale sweet layer:Case study of Weiyuan-Rongchang block of SINOPEC[J]. Natural Gas Geoscience, 2019,30(7): 1037-1044.
CHEN J Y,WEI Y S,WANG J L, et al. Interwell-production interference and well spacing optimization in shale gas reservoir [J]. Natural Gas Geoscience, 2021,32 (7): 931-940.
DING L, CHENG F, YU R Z, et al. Current situation and development trend of horizontal well spacing for shale gas in North America[J].Natural Gas Geoscience,2020,31(4):559-566.
WAN Y J, HE C, SUN Y P, et al. Well deployment strategy and enlightenment of Haynesville shale gas play[J]. Natural Gas Geoscience, 2021,32(2): 287-297.
WU F R, YAN Y Y, YIN C. Real-time microseismic monitoring technology for hydraulic fracturing in shale gas reservoirs: A case study from the southern Sichuan Basin [J]. Natural Gas Industry, 2016,36(11): 46-50.
LIU Y W, LIAO R G, ZHANG Y, et al. Application of surface-downhole combined microseismic monitoring technology in the Fuling shale gas field and its enlightenment [J]. Natural Gas Industry, 2016,36(10): 56-62.
KUMAR A,SETH P, SHRIVASTAVA K,et al.Integrated analysis of tracer and pressure-interference tests to identify well interference[J]. SPE Journal, 2020,25(4):1623-1635.
JING C, PU C S, HE Y L, et al. Equivalent parabolic-type interpreting model of the interwell tracer monitoring for fractured low-permeability oil reservoirs[J]. Petroleum Geology & Oilfield Development in Daqing, 2016,35(6): 73-81.
HUANG X Q, WANG J J, DU Y, et al. Discussion on development mode of smaller well spacing and tridimensional development in the YS108 block Zhaotong National Shale Gas Demonstration area[J]. Natural Gas Geoscience, 2019,30(4): 557-565.
YONG R, CHANG C, ZHANG D L, et al. Optimization of shale-gas horizontal well spacing based on geology-engineering-economy integration: A case study of Well block Ning 209 in the National Shale Gas Development Demonstration Area[J]. Natural Gas Industry, 2020,40(7): 42-48.
ISHANK G, CHANDRA R, DEEPAK D, et al. Haynesville shale: Predicting long-term production and residual analysis to identify well interference and fracture hits[J]. SPE Reservoir Evaluation and Engineering,2020,23(1):132-142.
QIN J Z, CHENG S Q, ZHU J, et al. Integrated approach for well interference diagnosis considering complex fracture networks combining pressure and rate transient analysis.[C]. SPE Annual Technical Conference and Exhibition, Denver, Colorado,5-7 October,2020:SPE-201284-MS.
HE Y W, GUO J C, TANG Y, et al. Interwell Fracturing Interference Evaluation of Multi-Well Pads in Shale Gas Reservoirs: A Case Study in WY Basin[C]. SPE Annual Technical Conference and Exhibition, Virtual, 2020:SPE-201694-MS.
PIYUSH P, PRIYAVRAT S, PAYAM K, et al. Integrated Well Interference Modeling Reveals Optimized Well Completion and Spacing in the Marcellus Shale[C]. Annual Technical Conference and Exhibition, Dallas, 2018:SPE-191393-MS.
PHILIPPE V, ERIC P. A New Methodology for Naturally Fractured Reservoir Characterization: Use of Multi-Well Interference Tests Interpretation[C].SPE Europec featured at 82nd EAGE Conference and Exhibition, Virtual, 2020:SPE-200622-MS.
LI J Q, LIU Y W, HUANG C, et al. Multi-stage fracturing horizontal well interference test model and its application[J]. Lithologic Reservoirs, 2018,30(6): 138-144.
WANG Z G, SUN J. Practice and Recognition on the Shale Gas Well Group of Fuling Shale Gas Field[M]. Beijing: China Petrochemical Press, 2014:168-182.
CHEN T, SALASPORRAS R, MAO D, et al. Use of Interference Tests to Constrain the Spacing of Hydraulically Fractured Wells in Neuquen Shale Oil Reservoirs[C]. SPE Latin America and Caribbean Petroleum Engineering Conference, Buenos Aires, 2017:SPE-185518-MS.
ILKAY U, WISAM A, ERDINC E. Application of Well Interference Test Using Distributed Pressure Sensors to Optimize Well Spacing in Unconventional Shale Reservoirs[C]. SPE Abu Dhabi International Petroleum Exhibition & Conference, Abu Dhabi, 2019:SPE-197936-MS.
CHU W C, KYLE D. RAY F, et al. A new technique for quantifying pressure interference in fractured horizontal shale wells[J]. SPE Reservoir Evaluation & Engineering, 2020, 23(1):143-157.
HE Y W, CHENG S Q, QIN J Z et al. A Novel Multi-Well Interference Testing Model of a Fractured Horizontal Well and Vertical Wells[C]. SPE Annual Technical Conference and Exhibition, Dallas, 2018:SPE-191567-MS.
PUNEET S, RIPUDAMAN M, ASHISH K, et al. Estimating Hydraulic Fracture Geometry by Analyzing the Pressure Interference Between Fractured Horizontal Wells[C].SPE Annual Technical Conference and Exhibition, Dallas, 2018:SPE-191492-MS.
SVETLANA B, REGINA F, YULIA P, et al. Development of an Approach for the Numerical Analysis of Well Interference[C].SPE Russian Petroleum Technology Conference, Moscow, 2019.
PUNEET S, KAUSTUBH S, ASHISH K, et al. Pressure Interference Between Fractured Horizontal Wells: Impact of Complex Fracture Growth on Offset Well Pressure Measurements[C]. 53rd U.S. Rock Mechanics/Geomechanics Symposium, New York, 2019.