Sparse well pattern and high-efficient development of metamorphic buried hills reservoirs in Bohai Sea area, China

Tong, Kaijun; Li, Bo; Dai, Wen Jin; Zheng, Hao; Zhang, Zhannü; Cheng, Qi; Wang, Jianli; Fang, Na

doi:10.1016/s1876-3804(17)30071-x

Cited by 10 publications

(9 citation statements)

References 5 publications

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“…8 and clearly show that the slopes of the FHH graphs of all samples are not uniform, so there is more than one fractal dimension. Based on previous studies 1,26,38,39 , the nitrogen adsorption isotherm can be divided into two main regions with a relative pressure of 0.5 (P/P 0 = 0.5), obtaining two fractal dimensions, D1 and D2. Region 1 is the monolayer-multilayer adsorption in which the dominant force is van der Waals, and D1 can be calculated from the slope of the line in region 1.…”

Section: Pore Fractal Characteristicsmentioning

confidence: 99%

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Semiquantitative Characterizations And Controlling Factors of Microscopic Pore Characteristics of The Metamorphic Rock Reservoir In The Central Paleo-Uplift Belt, Songliao Basin

Zeng

Shan

Hao

et al. 2021

Preprint

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Currently, metamorphic rock is a common target for oil and gas exploration, and reservoirs are the key factors restricting hydrocarbon exploration and development in metamorphic rocks. The deep metamorphic rock gas reservoir in the central paleo-uplift of the northern Songliao Basin has good exploration and development potential. In this study, we use a combination of qualitative descriptions and quantitative analysis to comprehensively analyze the pore characteristics of the reservoir and explore the factors controlling the pore characteristics of the metamorphic rock reservoir in the central paleo-uplift belt of the Songliao Basin. The metamorphic rock reservoir in the central paleo-uplift belt contains three types of lithologies: chlorite schist, mylonite, and mica schist, each with different protoliths and metamorphic histories. The reservoir space can be divided into 4 pore types, and the reservoir space of each lithology is quite different. The results of high-pressure mercury intrusion and nitrogen adsorption indicate that the pore size distributions of the schist and mylonite differ. Compared with the schist, the mylonite has less reservoir space, stronger homogeneity, larger pore size, smaller specific surface area, more natural gas reservoir space and stronger natural gas adsorption capacity. This paper also studies the formation process of the reservoir and divides it into four stages. Finally, this article discusses in detail the factors controlling the microscopic pore characteristics of metamorphic rock reservoirs in the central paleo-uplift belt; the metamorphic rock protolith is the most important controlling factor.

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Section: Pore Fractal Characteristicsmentioning

confidence: 99%

“…The fractal Frenkel-Halsey-Hill (FHH) model has been proven to be the most effective method for analyzing the fractal behavior of porous media 38 . The FHH model, which has been widely recognized and used 1,26,38,39 , can be described using the following Eq. 3 8 :…”

Section: Pore Fractal Characteristicsmentioning

confidence: 99%

Semiquantitative Characterizations And Controlling Factors of Microscopic Pore Characteristics of The Metamorphic Rock Reservoir In The Central Paleo-Uplift Belt, Songliao Basin

Zeng

Shan

Hao

et al. 2021

Preprint

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“…The metamorphic buried hill fractured reservoir in oilfield A is located in the mid-north section of Liaoxi low uplift. It is the largest metamorphic fractured reservoir invested in Bohai Oilfield at present [23] [24] [25] [26]. The main producing layer is Archean metamorphic buried hill, the buried depth of the reservoir is 1700 -1900 m, and the longitudinal span is as high as 200 m. The lithology is mainly biotite gneiss and plagioclase gneiss, and the reservoir type is pore-fracture.…”

Section: General Situation Of Oilfieldmentioning

confidence: 99%

Research and Application of Water Flooding Timing and Method for Blocky Bottom Water Fractured Buried Hill Reservoir

Zhu¹,

Cai²,

Wang³

et al. 2019

JPEE

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Oilfield A is a fractured buried hill reservoir in Bohai bay of China. In order to solve the difficult problem of water flooding timing and method in oilfield. Considering the characteristics of the buried hill fractures with stress sensitivity and strong heterogeneity, the ECLIPSE software was used in the research, and a three-dimensional injection-production numerical model for horizontal wells in buried hill reservoirs is established. According to the main research factors in water flooding, a series of water flooding schemes are designed, and the optimization of water flooding timing, oil recovery rate and water flooding mode in buried hill reservoirs were carried out. The results show that the optimum pressure level of fractured reservoir is about 70% of the original reservoir pressure. The optimal water flooding method is the conventional water flooding in the initial stage, when the water cut reaches 80%, it is converted into periodic water flooding. The oil recovery is the highest when the water injection period is 4 months. Field tests show that conventional water flooding is carried out in the initial stage of the oilfield A when the pressure is reduced to 70% of the original. Periodic water flooding is carried out when water cut is 80%. Good development results had been achieved in the 10 years since oilfield A was put into production. The average productivity of single well reached 300 m 3 /d in the initial stage, at present, the water cut is 60%, and the recovery degree is 18.5%, which is better than that of similar oilfields. This technology improves the water flooding effect of blocky bottom water fractured dual media reservoirs in metamorphic buried hills, and provides a reference for the development of similar reservoirs.

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“…In recent years, oil and gas fields of commercial value have been found in buried hills and overlying strata in various oil-bearing basins in China (Jin et al, 2019;Tong et al, 2017;Cui et al, 2018;Zhao et al, 2010;Liu et al, 2014;Dong et al, 2015). The structure, reservoir characteristics and reservoir-forming mechanics of such buried hills and their overlying strata have become a research hotspot (Zhao et al, 2010;Wang et al, 2017;Luo et al, 2008;Ma, 2004).…”

Section: Introductionmentioning

confidence: 99%

Reservoir Characteristics of Buried-hill Draping Zone in L Oilfield, Offshore China

Liu¹,

Zhang²,

Zheng³

et al. 2021

ESR

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The reservoir in different parts of buried-hill draping zone is often quite different, so it is of great significance to clarify the reservoir characteristics for exploration and development. Based on core, well logging, seismic data and production data, reservoir characteristics of oil layer Ⅱ in the lower second member of Dongying Formation of L oilfield, Bohai Bay Basin, offshore eastern China are systematically studied. Analyses of seismic facies, well-seismic combination, paleogeomorphology, and sedimentary characteristics are carried out. Sediment source supply, lake level and buried hill basement geomorphology all contribute to reservoir quality. The research suggests that the different parts of buried-hill draping zone can be divided into four types. Reservoir thickness and physical properties vary. The area where the provenance direction is consistent with the ancient valley direction is a favorable location for the development of high-quality reservoirs. Under the guidance of the results, oilfield production practices in L oilfield offshore China are successful. Knowledge gained from study of L oilfield has application to the development of other similar fields.

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Sparse well pattern and high-efficient development of metamorphic buried hills reservoirs in Bohai Sea area, China

Cited by 10 publications

References 5 publications

Semiquantitative Characterizations And Controlling Factors of Microscopic Pore Characteristics of The Metamorphic Rock Reservoir In The Central Paleo-Uplift Belt, Songliao Basin

Semiquantitative Characterizations And Controlling Factors of Microscopic Pore Characteristics of The Metamorphic Rock Reservoir In The Central Paleo-Uplift Belt, Songliao Basin

Research and Application of Water Flooding Timing and Method for Blocky Bottom Water Fractured Buried Hill Reservoir

Reservoir Characteristics of Buried-hill Draping Zone in L Oilfield, Offshore China

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