Reservoir identification using full stack seismic inversion technique: A case study from Cambay basin oilfields, India

被引:14
作者
Chatterjee, Rima [1 ]
Gupta, Saurabh Datta [2 ]
Farroqui, M. Y. [2 ]
机构
[1] Indian Sch Mines, Dept Appl Geophys, Dhanbad 826004, Bihar, India
[2] Gujarat State Petr Corp Ltd, Gandhinagar, India
关键词
acoustic impedance; full stack inversion; Cambay basin; India; ACOUSTIC-IMPEDANCE; SOURCE ROCKS;
D O I
10.1016/j.petrol.2013.08.006
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
Full stack seismic data in Cambay basin, India, shows limited contrast between sandstone reservoirs and other lithologies. The seismic inversion result has been used here to convert the seismic reflection data into impedance log at each point and the ratio of every point. Wavelet estimations have been carried out for four wells namely, AM-11, AM-12, AM-13 and AM-14 lying between Sanand and Nawagam oilfields located in the Ahmedabad-Mehsana block of Cambay basin. The combination of P-impedance and compressional wave velocity (Vp) to shear wave velocity (Vs) ratio has been used to delineate the pay sand. Reservoir pay sand in Eocene pay formation has been delineated from these wells. The cross plotting technique between Vp/Vs (from four wells AM-11 to AM-14 under the study area) and P-impedance values has differentiated sand and shale. It is observed that the high P-impedance sand is associated with low porosity (15-18%) values while the low P-impedance sand is associated with relatively high porosity (20-25%) values. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码:87 / 95
页数:9
相关论文
共 19 条
[1]  
[Anonymous], P 6 INT C EXP PETR G
[2]  
[Anonymous], POROSITY PREDICTION
[3]  
[Anonymous], P 5 C EXP PETR GEOPH
[4]  
[Anonymous], MAR GEOL
[5]  
[Anonymous], P 6 INT C EXP PETR G
[6]  
[Anonymous], P 7 INT C EXP PETR G
[7]  
[Anonymous], AM ASS PETROLEUM GEO
[8]  
[Anonymous], 1993, LITHOSTRATIGRAPHY IN
[9]   The effective source rocks in the north Cambay Basin, India [J].
Banerjee, A ;
Jha, M ;
Mittal, AK ;
Thomas, NJ ;
Misra, KN .
MARINE AND PETROLEUM GEOLOGY, 2000, 17 (10) :1111-1129
[10]  
BHANDARI LL, 1975, AAPG BULL, V59, P856