断控型碳酸盐岩油藏动态储量计算方法

doi:10.7657/XJPG20240415

摘要/Abstract

摘要：

断控型碳酸盐岩油藏非均质性强，不同尺寸的孔、缝、洞交错发育，采用一般物质平衡方法计算的动态储量可能大于静态储量。在引入水油比的基础上，考虑孔缝洞介质不同时的岩石压缩系数，得到了适用于断控型油藏的综合压缩系数，并在此基础上建立了断溶体流动物质平衡新方程，通过数值模拟，验证了新方程的准确性与适用性。结果表明：新方程计算的动态储量与数值模拟得到的静态储量误差仅为0.109 9%，验证了新方程准确可靠；哈拉哈塘地区多口井用新方程计算的动态储量与地质建模雕刻的静态储量相对误差为-4.82%~-0.15%，远远低于物质平衡方程计算的动态储量与静态储量的相对误差，新方程计算结果更接近实际情况，更适用于哈拉哈塘地区断控型碳酸盐岩油藏的储量计算。

关键词: 断控型油藏, 碳酸盐岩, 水油比, 岩石压缩系数, 流动物质平衡, 动态储量

Abstract:

Fault-controlled carbonate reservoirs are highly heterogeneous, with interweaving development of pores, fractures, and vugs of various sizes. For this kind of reservoirs, the dynamic reserves calculated using conventional material balance methods may be larger than the static reserves. By incorporating water-oil ratio and considering rock compressibility coefficients for different pore-fracture-vug media, a comprehensive compressibility coefficient suitable for the fault-controlled reservoirs was derived. On this basis, a new flow material balance equation was established for the fault-karst reservoir, and its accuracy and applicability were verified using numerical simulation. The research results show that the dynamic reserves calculated by the new equation have an error of only 0.1099% with the static reserves obtained from numerical simulation, confirming the new equation’s reliability and accuracy. In the Halahatang area, the relative error between the dynamic reserves calculated using the new equation and the static reserves derived from geological modeling for multiple wells ranged from -4.82% to -0.15%, which is significantly lower than that calculated using the conventional material balance equation. The results obtained from the new equation are closer to actual conditions, making it more suitable for calculating the reserves of the fault-controlled carbonate reservoirs in the Halahatang area.

Key words: fault-controlled reservoir, carbonate rock, water-oil ratio, rock compressibility coefficient, flow material balance, dynamic reserves

中图分类号:

TE344

耿洁, 乐平, 杨文明, 杨博, 赵彬, 张如杰. 断控型碳酸盐岩油藏动态储量计算方法[J]. 新疆石油地质, 2024, 45(4): 499-504.

GENG Jie, YUE Ping, YANG Wenming, YANG Bo, ZHAO Bin, ZHANG Rujie. Dynamic Reserves Calculation Method for Fault-Controlled Carbonate Reservoirs[J]. Xinjiang Petroleum Geology, 2024, 45(4): 499-504.

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水油比	修正的综合压缩系数/MPa^-1	物质平衡方程计算储量/10⁴ t	断溶体流动物质平衡新方程计算储量/10⁴ t
0	0.001 29	242.38	193.91
0.5	0.001 54	203.60	162.88
1.0	0.001 79	175.50	140.41
2.0	0.002 28	137.55	110.04
3.0	0.002 77	113.10	90.48
4.0	0.003 26	96.03	76.82
5.0	0.003 76	83.43	66.74
8.0	0.005 23	59.88	47.90
9.0	0.005 73	54.73	43.78
10.0	0.006 22	50.38	40.31

井名	水油比	静态储量/10⁴ t	物质平衡方程		断溶体流动物质平衡新方程
井名	水油比	静态储量/10⁴ t	计算储量/10⁴ t	相对误差/%	计算储量/10⁴ t	相对误差/%
B井	3.0	40.0	60.07	50.18	39.94	-0.15
C井	3.0	20.0	20.57	2.85	19.70	-1.50
D井	4.0	50.0	58.62	17.24	47.59	-4.82
E井	3.0	4.9	5.67	15.71	4.85	-1.02
F井	3.0	11.5	12.32	7.13	11.15	-3.04
G井	3.0	25.0	26.74	6.96	24.83	-0.68
H井	4.0	8.5	8.98	5.65	8.36	-1.65