未确知测度模型在南堡H断块油层潜力评价中的应用

doi:10.13809/j.cnki.cn32-1825/te.2023.02.007

Abstract

Abstract:

How to accurately evaluate the current reservoir potential directly affects the potential tapping of remaining oil by water injection in complex fault block reservoirs during the middle and late stages of development. By the comprehensive analysis of static reservoir geological characteristics and dynamic development effects, the main control factors of residual oil distribution in complex fault block reservoirs are determined, and the reservoir potential is evaluated by the analytic hierarchy process combined with unascertained measure evaluation method based on unascertained mathematical theory and attribute measurement theory. An accurate unascertained measure function is established by building an evaluation index system, and by the confidence degree identification criteria to determine the evaluation space, the evaluation result of reservoir potential is finally obtained. The research results show that the reservoir potential is comprehensively evaluated by using the analytic hierarchy process and unascertained measurement, the evaluation system consisting of seven parameters is established and the unascertained measurement function is constructed. According to the reservoir potential, the reservoirs can be divided into four categories, of which category Ⅰ and category Ⅱ have good potential. The evaluation results are similar to the numerical simulation results, and the reliability of the evaluation results is verified by the on-site implementation.

Key words: static and dynamic combination analysis, remaining oil, analytic hierarchy process, uncertainty measure, reservoir potential evaluation

CLC Number:

TE357

QU Lili, LI Minglin, WU Zhimin, ZHANG Lin, FENG Linping, DENG Liping. Application of unascertained measure model in reservoir potential evaluation of Nanpu H Fault Block[J].Reservoir Evaluation and Development, 2023, 13(2): 190-199.

Figures/Tables 10

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References 25

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注采相带	统计井数（口）	见效井数（口）	见效比例（%）	平均井距（m）	见效时间（d）	见水时间（d）	压力传导速度（m/d）
河道注水河道见效（顺物源）	10	8	80.0	266	162	566	1.64
河道注水河道见效（垂直物源）	10	6	60.0	247	201	697	1.23
河道注水河道见效（与物源方向相反）	10	7	70.0	268	180	568	1.49
河道注水侧缘见效	8	2	25.0	257	287	837	0.90
侧缘注水河道见效	8	4	50.0	243	307	987	0.79
侧缘注水侧缘见效	6	2	33.3	244	388	未见水	0.63

影响因素			评价等级
影响因素			C₁	C₂	C₃	C₄
地质因素	构造特征	微构造类型	正向微构造	斜面高部位	斜面低部位	负向微构造
	沉积特征	沉积微相	河口坝	水下分流河道	河道侧缘	席状砂
	物性特征	渗透率（10^-3 μm²）	>200	100~200	100~50	<50
	物质基础	油层有效油厚（m）	>8	6~8	4~6	<4
开发因素	开采情况	综合含水（%）	<20	20~60	60~80	>80
	开采情况	采出程度（%）	<10	10~15	15~20	>20
	能量补给	压力系数	>0.8	0.6~0.8	0.4~0.6	<0.4

一级参数	地质因素	开发因素
地质因素	1	3/2
开发因素	2/3	1

二级参数	微构造	沉积微相	渗透率	有效厚度
微构造	1	1	1/2	1/4
沉积微相	1	1	1/2	1/4
渗透率	2	2	1	1/3
有效厚度	4	4	3	1

二级参数	采出程度	含水	压力系数
采出程度	1	1	1/2
含水	1	1	1/2
压力系数	2	2	1

Application of unascertained measure model in reservoir potential evaluation of Nanpu H Fault Block

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井号	C₁	C₂	C₃	C₄	储层等级	分数	排序
W29	0.736	0.263	0	0	Ⅰ	0.93	1
W27	0.590	0.363	0.046	0	Ⅰ	0.89	2
W26	0.588	0.312	0.060	0.040	Ⅰ	0.86	3
W25	0.580	0.332	0	0.107	Ⅰ	0.86	4
W22	0.401	0.400	0.198	0	Ⅱ	0.80	5
W21	0.338	0.554	0.043	0.064	Ⅱ	0.79	6
W28	0.336	0.554	0.043	0.066	Ⅱ	0.79	7
W20	0.358	0.463	0.050	0.128	Ⅱ	0.76	8
W14	0.481	0.194	0.174	0.150	Ⅱ	0.75	9
W7	0.473	0.194	0.185	0.147	Ⅱ	0.75	10
W1	0.461	0.194	0.194	0.150	Ⅱ	0.74	11
W17	0.187	0.574	0.239	0	Ⅱ	0.74	12
W10	0.419	0.243	0.185	0.153	Ⅱ	0.73	13
W16	0.386	0.148	0.412	0.054	Ⅲ	0.72	14
W13	0.545	0.043	0	0.412	Ⅱ	0.68	15
W12	0.303	0.168	0.432	0.097	Ⅲ	0.67	16
W15	0.232	0.229	0.495	0.043	Ⅱ	0.66	17
W32	0.358	0.051	0.457	0.135	Ⅲ	0.66	18
W11	0.359	0.051	0.447	0.143	Ⅲ	0.66	19
W23	0.319	0.143	0.385	0.153	Ⅲ	0.66	20
W2	0.243	0.193	0.392	0.272	Ⅲ	0.65	21
W30	0.439	0.067	0.104	0.389	Ⅲ	0.64	22
W19	0.429	0.067	0.104	0.400	Ⅲ	0.63	23
W24	0.213	0.193	0.442	0.152	Ⅲ	0.62	24
W9	0.284	0.218	0.167	0.330	Ⅲ	0.61	25
W8	0.401	0.009	0.223	0.366	Ⅲ	0.61	26
W5	0.226	0.158	0.359	0.256	Ⅲ	0.59	27
W3	0.305	0.124	0.146	0.425	Ⅳ	0.58	28
W31	0.296	0.038	0.239	0.427	Ⅳ	0.56	29
W6	0.304	0.019	0.147	0.530	Ⅳ	0.52	30
W18	0.303	0.018	0.149	0.530	Ⅳ	0.52	31
W4	0.181	0.123	0.265	0.431	Ⅳ	0.51	32

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