Thin Reservoir Prediction Under Strong Reflection Shielding Background in Chunguang Area

doi:10.7657/XJPG20210516

Abstract

Abstract:

In the Chunguang exploration area, the Carboniferous strata show strong seismic reflections, while the Cretaceous reservoir above and vertically close to Carboniferous is thin and laterally superposed, and completely shielded by the strong reflections from the Carboniferous. Vertically, we used forward modelling to get the dominant frequencies of AC and GR curves, and reconstructed the acoustic impedance curve to improve reservoir identification effects. Horizontally, the distribution of thin reservoirs shielded by strong reflections is predicted using high-resolution seismic inversion with waveform indication. Twelve lithologic traps has been identified, and commercial oil and gas flows have been obtained from one preliminary exploration well and one evaluation well. It has been proved that the technology can effectively predict thin reservoirs shielded by strong reflections, and it is also of great significance for predicting thin reservoirs on other similar complex background.

Key words: Chunguang area, strong reflection, seismic forward modeling, sensitivity analysis, curve reconstruction, seismic inversion, thin reservoir prediction

CLC Number:

P631

XIE Qi, LI Hengquan, LI Lei, ZHANG Xinchao, GUO Jiayu, YANG Xingxing, JIA Xiurong. Thin Reservoir Prediction Under Strong Reflection Shielding Background in Chunguang Area[J]. Xinjiang Petroleum Geology, 2021, 42(5): 617-623.

Figures/Tables 7

Fig. 1.

Fig. 2.

Fig. 3.

Fig. 4.

Fig. 5.

Fig. 6.

Fig. 7.

References 17

[1]	刘杰, 张忠涛, 刘道理, 等. 强反射背景下沉积体边界检测及流体识别方法[J]. 石油物探, 2016, 55(1):142-149.
	LIU Jie, ZHANG Zhongtao, LIU Daoli, et al. Sediment boundary identification and fluid detection for the seismic data with strong background reflections[J]. Geophysical Prospecting for Petroleum, 2016, 55(1):142-149.
[2]	张军华, 刘振, 刘炳杨, 等. 强屏蔽层下弱反射储层特征分析及识别方法[J]. 特种油气藏, 2012, 19(1):23-26.
	ZHANG Junhua, LIU Zhen, LIU Bingyang, et al. Analysis and identification of reservoir characteristics of weak reflectors under strong shielding layer[J]. Special Oil & Gas Reservoirs, 2012, 19(1):23-26.
[3]	王建花, 李庆忠, 邱睿. 浅层强反射界面的能量屏蔽作用[J]. 石油地球物理勘探, 2003, 38(6):589-596.
	WANG Jianhua, LI Qingzhong, QIU Rui. Energy shielding action of shallow strong reflector[J]. Oil Geophysical Prospecting, 2003, 38(6):589-596.
[4]	谢春临, 黄伟, 关晓巍, 等. 波形分解技术在强反射背景下薄砂层识别中的应用[J]. 石油地球物理勘探, 2017, 52(3):516-520.
	XIE Chunlin, HUANG Wei, GUAN Xiaowei, et al. Thin sand identification under strong reflection with volume-based waveform decomposition[J]. Oil Geophysical Prospecting, 2017, 52(3):516-520.
[5]	张新超, 李锋, 严永新, 等. 分频融合反演技术在春光探区的应用[J]. 石油地球物理勘探, 2018, 53(5):1 006-1 013.
	ZHANG Xinchao, LI Feng, YAN Yongxin, et al. Application of segmented-frequency-band fusion inversion in Chunguang prospect area[J]. Oil Geophysical Prospecting, 2018, 53(5):1 006-1 013.
[6]	樊晓伊, 薛国勤, 刘斌, 等. 曲流河单一河道砂体井震联合识别[J]. 新疆石油地质, 2019, 40(2):228-234.
	FAN Xiaoyi, XUE Guoqin, LIU Bin, et al. Recognition of single channel sandbody of meandering river with logging-seismic combination[J]. Xinjiang Petroleum Geology, 2019, 40(2):228-234.
[7]	樊晓伊, 薛国勤, 刘斌, 等. 准噶尔盆地春光油田稀井区曲流河储集层构型定量表征[J]. 新疆石油地质, 2020, 41(2):147-157.
	FAN Xiaoyi, XUE Guoqin, LIU Bin, et al. Quantitative characterization of reservoir architecture of meandering-river deposits in sparse well blocks:a case study of Chunguang oilfield,Junggar basin[J]. Xinjiang Petroleum Geology, 2020, 41(2):147-157.
[8]	张辉, 岳欣欣, 朱颜, 等. 准噶尔盆地春光油田油藏特征及成藏模式[J]. 新疆石油地质, 2020, 41(4):379-387.
	ZHANG Hui, YUE Xinxin, ZHU Yan, et al. Reservoir characteristics and hydrocarbon accumulation model in Chunguang oilfield,Junggar basin[J]. Xinjiang Petroleum Geology, 2020, 41(4):379-387.
[9]	朱颜, 李艳然, 岳欣欣, 等. 车排子凸起胜金口组沉积相及主控因素[J]. 新疆石油地质, 2021, 42(1):10-20.
	ZHU Yan, LI Yanran, YUE Xinxin, et al. Sedimentary facies and controlling factors of Shengjinkou formation in Chepaizi swell[J]. Xinjiang Petroleum Geology, 2021, 42(1):10-20.
[10]	严永新, 张驰, 常炳章, 等. 准噶尔盆地春光区块地震预测技术应用[J]. 石油实验地质, 2013, 35(1):104-107.
	YAN Yongxin, ZHANG Chi, CHANG Bingzhang, et al. Application of seismic prediction technology in Chunguang block,Junggar basin[J]. Petroleum Geology & Experiment, 2013, 35(1):104-107.
[11]	郭佳玉, 谢启, 张新超, 等. 地震正反演技术在春光油田沙湾组二砂组薄互层储层中的应用[J]. 石油地质与工程, 2019, 33(1):37-41.
	GUO Jiayu, XIE Qi, ZHANG Xinchao, et al. Application of seismic forward inversion technique in thin interbedded reservoir from Ⅱsand group of Shawan formation in Chunguang oilfield[J]. Petroleum Geology and Engineering, 2019, 33(1):37-41.
[12]	王鹏飞, 刘桂林, 李嵩阳, 等. 春光区块薄储层地震响应特征的模型正演分析[J]. 石油地质与工程, 2012, 26(6):64-67.
	WANG Pengfei, LIU Guilin, LI Songyang, et al. Forward modeling analysis of seismic response of thin reservoir bed in Chunguang block[J]. Petroleum Geology and Engineering, 2012, 26(6):64-67.
[13]	肖学, 田仁飞, 杨春峰, 等. 岩性油藏弱反射地震储层预测方法[J]. 科学技术与工程, 2015, 15(5):30-35.
	XIAO Xue, TIAN Renfei, YANG Chunfeng, et al. Studying methods of weak seismic reflection of lithologic reservoir to predict reservoirs[J]. Science Technology and Engineering, 2015, 15(5):30-35.
[14]	赵继龙, 熊冉, 陈戈, 等. 伽马拟声波分频重构反演在储层预测中的应用[J]. 地球物理学进展, 2013, 28(4):1 954-1 961.
	ZHAO Jilong, XIONG Ran, CHEN Ge, et al. GR quasi-acoustic frequency divisions reconstruct seismic inversion and application in reservoir prediction[J]. Progress in Geophysics, 2013, 28(4):1 954-1 961.
[15]	付志方, 张君, 邢卫新, 等. 拟声波构建技术在砂泥岩薄互层储层预测中的应用[J]. 石油物探, 2006, 45(4):415-417.
	FU Zhifang, ZHANG Jun, XING Weixin, et al. Application of quasi-acoustic constructing technique to reservoir prediction of thin interbed[J]. Geophysical Prospecting for Petroleum, 2006, 45(4):415-417.
[16]	徐旺林, 张繁昌, 郭彦如, 等. 贝叶斯全频信息同时反演在鄂尔多斯盆地碳酸盐岩储层预测中的应用[J]. 石油地球物理勘探, 2014, 49(4):723-728.
	XU Wanglin, ZHANG Fanchang, GUO Yanru, et al. Bayesian full frequency simultaneous inversion for carbonate reservoir in Erdos basin[J]. Oil Geophysical Prospecting, 2014, 49(4):723-728.
[17]	滕龙, 程玖兵. 贝叶斯框架下联合AVA反演与统计岩石物理的储层参数估计[J]. 石油地球物理勘探, 2014, 49(4):729-738.
	TENG Long, CHENG Jiubing. Bayesian petrophysical-properties estimation with AVA inversion and statistical rock physics[J]. Oil Geophysical Prospecting, 2014, 49(4):729-738.