相控叠前地质统计学反演方法在低渗油藏优质储层预测中的应用——以A区沙三段3亚段V油组为例

doi:10.13809/j.cnki.cn32-1825/te.2022.04.015

Abstract

Abstract:

In order to solve the difficulties in prediction of high-quality reservoirs in low-permeability V Oil Formation of Es₃ sub member in Block A, the residual velocity analysis, flattening and denoising of prestack gather data are carried out to improve the quality of data. Subsequently, well logging formation evaluation, petrophysical modeling and elastic curve forward modeling are carried out, lithology and physical property sensitive parameters are optimized, and it is clear that the combined application of two elastic parameters of speed ratio of P and S waves（V_p/V_s） and vertical wave impedance（C_PIMP） could identify high-quality reservoirs. Then, the prestack inversion data preparation, facies control scheme design, well free simulation constant variation and variable range optimization are carried out, and a set of comprehensive prediction method for high-quality reservoirs in low-permeability reservoirs based on facies controlled pre stack geostatistics inversion is established. The inversion results obtained by this method not only improve the accuracy of reservoir prediction, but also are more in line with the geological law. The prediction results can effectively reflect the distribution of high-quality reservoirs in low-permeability reservoirs. Two horizontal wells have been deployed and good application results have been achieved.

Key words: reservoir prediction, geostatistical inversion, prestack inversion, facies controlled inversion, low permeability reservoir

CLC Number:

TE35

ZHAO Baoyin,ZHANG Ming. Application of facies-controlled prestack geostatistical inversion method in high quality reservoir prediction of low permeability reservoir: A case study of V Oil Formation of Es₃³ in Block A[J].Petroleum Reservoir Evaluation and Development, 2022, 12(4): 666-676.

Figures/Tables 12

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类别	井名	测井砂地比	反演砂地比	误差（%）
Ⅳ1—Ⅳ10 盲井验证	T2-11	45	45	0
	T2-8	42	48	6
	T2-14	25	35	10
	T2-15	23	45	22
	T6-2	29	48	19
平均误差				11. 4
Ⅳ11—Ⅳ18盲井验证	T2-11	14	10	4
	T2-8	36	5	31
	T2-14	20	30	10
	T2-15	12	27	15
	T6-2	24	43	19
平均误差				15. 8
V1—V8 盲井验证	T2-11	45	10	35
	T2-8	45	10	35
	T2-14	42	24	18
	T2-15	30	25	5
	T6-2	23	18	5
平均误差				15. 7
V9—V14 盲井验证	T2-11	45	28	17
	T2-8	47	47	0
	T2-14	28	28	0
	T2-15	30	30	0
	T2-P1	53. 7	51. 2	2. 5
	T6-2	未穿
平均误差				7. 5
V15—V18 盲井验证	T2-11	56	66	10
	T2-8	未穿
	T2-14	65	65	0
	T2-15	49	18	31
	T2-P1	37. 3	46. 3	9
平均误差				12. 5

Application of facies-controlled prestack geostatistical inversion method in high quality reservoir prediction of low permeability reservoir: A case study of V Oil Formation of Es₃³ in Block A

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类别	井名	测井砂地比	反演砂地比
约束井组	T2-5	47	47
	T2-2	51	51
	T2-6	30	30
	T2-7	31	31
	T6	33	33
	T8	20	20
	T10-1	28	28
	T4	44	44
	T5	15	15
	T6-1	18	18
	T2-13	28	28
	T2-3	30	30
	T2-1	52	52
	T2-10	30	30
	T9	30	30
	T2-15	15	15
	T2-9	20	20
	T4-3	55	55
	T4-1	10	10
	T8-2	44	44
	T12-1	50	50
	T10	30	30
	T8-1	12	12

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Application of facies-controlled prestack geostatistical inversion method in high quality reservoir prediction of low permeability reservoir: A case study of V Oil Formation of Es33 in Block A

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Application of facies-controlled prestack geostatistical inversion method in high quality reservoir prediction of low permeability reservoir: A case study of V Oil Formation of Es₃³ in Block A