Determination of GWC and Estimation of Gas Reserves of P4 Reservoir of Pinghu Formation in M Gasfield

doi:10.7657/XJPG20200511

Abstract

Abstract:

Constrained by operation cost in the process of offshore gas field development, it is a common case that only a few exploratory and development wells are drilled for evaluating new structures. This often leads to the situation that no well is drilled into the gas-water contact (GWC), and consequently some uncertainties in the estimation of static geological reserves, and obvious differences between dynamic and static geological reserves with the development going on and more production data collected. Based on mercury injection experiments on special cores, the relationship between water saturation and gas column height under formation conditions is established by using the capillary pressure J function, then the gas column height in the P4 reservoir of Pinghu formation in M gasfield is calculated, and finally the static geological reserves are estimated again. The results are basically consistent with the dynamic reserves calculated using the material balance method. In addition, the geological model of the gas field is updated according to the new understanding. The modelled BHP is well consistent with the measured BHP, indicating the good agreement between predicted and estimated geological reserves. The method proposed in the paper is applicable to some extent.

Key words: Pinghu formation, capillary pressure GWC, water saturation, gas column height, BHP, reserves estimation, geologic model

CLC Number:

TE311

WANG Jin. Determination of GWC and Estimation of Gas Reserves of P4 Reservoir of Pinghu Formation in M Gasfield[J]. Xinjiang Petroleum Geology, 2020, 41(5): 582-586.

Figures/Tables 7

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Table 1

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References 21

[1]	周涌沂, 李阳, 孙焕泉. 用毛管压力曲线确定流体界面[J]. 油气地质与采收率, 2002,9(5):37-39.
	ZHOU Yongyi, LI Yang, SUN Huanquan. Determination of fluid interface by capillary pressure curve[J]. Petroleum Geology and Recovery Efficiency, 2002,9(5):37-39.
[2]	李成, 孙来喜, 袁京素, 等. 低渗透气藏气水界面预测新方法[J]. 钻采工艺, 2009,32(3):60-62.
	LI Cheng, SUN Laixi, YUAN Jingsu, et al. A new prediction method of gas/water interface in low permeability gas reservoir[J]. Drilling & Production Technology, 2009,32(3):60-62.
[3]	刘晓鹏, 肖亮, 张伟. 储层毛管压力曲线构造方法及其应用[J]. 西南石油大学学报(自然科学版), 2008,30(6):126-130. doi: 10.3863/j.issn.1000-2634.2008.06.030
	LIU Xiaopeng, XIAO Liang, ZHANG Wei. Constructing method and application of reservoir capillary pressure curve[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2008,30(6):126-130.
[4]	何更生, 唐海. 油层物理[M]. 北京: 石油工业出版社, 2011.
	HE Gengsheng, TANG Hai. Reservoir physics[M]. Beijing: Petroleum Industry Press, 2011.
[5]	李传亮. 油藏工程原理[M]. 北京: 石油工业出版社, 2011.
	LI Chuanliang. Principles of reservoir engineering[M]. Beijing: Petroleum Industry Press, 2011.
[6]	PITTMAN E D. Relationship of porosity and permeability to various parameters derived from mercury injection-capillary pressure curves for sandstone[J]. The American Association of Petroleum Geologists Bulletin, 1992,76(2):191-198.
[7]	廖敬, 彭彩珍, 吕文均, 等. 毛管压力曲线平均化及J函数处理[J]. 特种油气藏, 2008,15(6):73-75.
	LIAO Jing, PENG Caizhen, LV Wenjun, et al. Averaging capillary pressure curve and processing J function[J]. Special Oil & Gas Reservoirs, 2008,15(6):73-75.
[8]	李久娣, 严涛, 赵天沛. 利用毛管压力资料计算原始含油(气)饱和度的不确定性分析[J]. 海洋石油, 2005,25(4):11-16.
	LI Jiudi, YAN Tao, ZHAO Tianpei. Uncertainty analysis of calculating original oil & gas saturation using capillary pressure data[J]. Offshore Oil, 2005,25(4):11-16.
[9]	陈杰, 周改英, 赵喜亮, 等. 储层岩石孔隙结构特征研究方法综述[J]. 特种油气藏, 2005,12(4):11-14.
	CHEN Jie, ZHOU Gaiying, ZHAO Xiliang, et al. Overview of study methods of reservoir rock pore structure[J]. Special Oil & Gas Reservoirs, 2005,12(4):11-14.
[10]	廖明光, 付晓文. 砂岩储层的毛管压力曲线反演模型[J]. 西南石油学院学报, 2000,22(4):5-8.
	LIAO Mingguang, FU Xiaowen. Inverse model of capillary pressure curve for sandstone reservoir rocks[J]. Journal of Southwest Petroleum Institute, 2000,22(4):5-8.
[11]	付焱鑫. 低渗致密气藏密闭取心含水饱和度校正:以东海盆地西湖凹陷花港组储集层为例[J]. 新疆石油地质, 2018,39(6):713-716.
	FU Yanxin. Water saturation correction through sealed coring in low-permeability tight gas reservoirs:a case study from Huagang formation in Xihu sag,East China Sea basin[J]. Xinjiang Petroleum Geology, 2018,39(6):713-716.
[12]	田键, 康毅力, 罗平亚, 等. 致密储集层初始含水饱和度形成过程实验模拟:以鄂尔多斯盆地延长组长7致密油藏为例[J]. 新疆石油地质, 2018,39(6):701-707.
	TIAN Jian, KANG Yili, LUO Pingya, et al. Experimental simulation of initial water saturation forming process in tight reservoirs:a case study of Chang 7 tight oil reservoir in Ordos basin,NW China[J]. Xinjiang Petroleum Geology, 2018,39(6):701-707.
[13]	杨宇, 周文, 林璠, 等. 一种新的致密气藏平均毛管压力计算模型[J]. 成都理工大学学报(自然科学版), 2014,41(6):768-772.
	YANG Yu, ZHOU Wen, LIN Fan, et al. A new method for computing average capillary pressure curve of tight gas reservoir[J]. Journal of Chengdu University of Technology(Science & Technology Edition), 2014,41(6):768-772.
[14]	罗明高. 毛管压力曲线分布特征的确定[J]. 西南石油学院学报, 1988,10(4):74-85.
	LUO Minggao. Determination of the distribution types of capillary pressure curve[J]. Journal of Southwest Petroleum Institute, 1988,10(4):74-85.
[15]	刘义坤, 王永平, 唐慧敏, 等. 毛管压力曲线和分形理论在储层分类中的应用[J]. 岩性油气藏, 2014,26(3):89-100.
	LIU Yikun, WANG Yongping, TANG Huimin, et al. Application of capillary pressure curves and fractal theory to reservoir classification[J]. Lithologic Reservoirs, 2014,26(3):89-100.
[16]	缪志伟. 一种计算平均毛管压力曲线的方法[J]. 新疆石油地质, 1997,18(1):67-69.
	MIAO Zhiwei. A method for determining average capillary pressure curve[J]. Xinjiang Petroleum Geology, 1997,18(1):67-69.
[17]	GANG T, KELKAR M. A more general capillary pressure curve and its estimation from production data[R]. SPE 108180, 2007.
[18]	赵行, 贾春生, 彭小龙, 等. 储层岩石平均毛管压力J函数研究[J]. 科学技术与工程, 2016,16(20):47-50.
	ZHAO Xing, JIA Chunsheng, PENG Xiaolong, et al. Study on the rock average capillary pressure J function[J]. Science Technology and Engineering, 2016,16(20):47-50.
[19]	董敏淑. 川东张家场气田石炭系气藏确定气水界面方法评价[J]. 天然气工业, 1996,16(3):31-33.
	DONG Minshu. Method for determining the gas-water interface in the carboniferous gas reservoir of Zhangjiachang gas field in east Sichuan[J]. Natural Gas Industry, 1996,16(3):31-33.
[20]	郑伟, 陈京元, 唐洪俊. 利用毛管压力计算充西区块香四气藏的含水饱和度[J]. 天然气勘探与开发, 2005,28(1):15-17.
	ZHENG Wei, CHEN Jingyuan, TANG Hongjun. Calculate water saturation of Xiangsi gas reservoir in Chongxi block by capillary pressure[J]. Natural Gas Exploration & Development, 2005,28(1):15-17.
[21]	彭彩珍, 李治平, 贾闽惠. 低渗透油藏毛管压力曲线特征分析及应用[J]. 西南石油学院学报, 2002,24(2):21-24.
	PENG Caizhen, LI Zhiping, JIA Minhui. Anylysis of characteristics of capillary pressure curves from low-permeability oil reservoirs and application of the method[J]. Journal of Southwest Petroleum Institute, 2002,24(2):21-24.