Deep burial diagenesis and reservoir quality evolution of high-temperature, high-pressure sandstones: Examples from Lower Cretaceous Bashijiqike Formation in Keshen area, Kuqa depression, Tarim basin of China

Lai, Jin; Wang, Guiwen; Chai, Yee Ho; Xin, Yi; Qing-kuan, WU; Zhang, Xiaotao; Sun, Yanhui

doi:10.1306/08231614008

Cited by 114 publications

(58 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Bulk isotopic signature of carbonate cement would provide some additional clues to clarify their origin [43,46]. According to the results published by Shi et al [29], Wang et al [30], Zhixue et al [27], and Tian et al [28], the 13 C values (PDB) are in the range from −8.51‰ to 1.00‰ with an average of −3.55‰, whereas the…”

Section: Isotope Analysis and Origins Of Carbonate Cementmentioning

confidence: 96%

“…Type I tends to fill the relatively large pores or replace the framework grains (Figures 7(c) and 7(d)) [6]. The eogenetic cement may have supported the framework grains and prevented extensive compaction [42], resulting in the floating grain texture and high volume of high minuscement porosity [43]. The pore-filling cement is suggested to have precipitated before significant compaction and thus support eogenetic origin [44,45]; however, the carbonate cement replacing framework grains may also precipitate after significant compaction.…”

Section: Carbonate Cementmentioning

confidence: 99%

See 1 more Smart Citation

Origin and Distribution of Carbonate Cement in Tight Sandstones: The Upper Triassic Yanchang Formation Chang 8 Oil Layer in West Ordos Basin, China

et al. 2017

Self Cite

View full text Add to dashboard Cite

Two generations of carbonate cement as Type I (microcrystalline calcite and dolomite) and Type II (mainly Fe-calcite and Fedolomite) are recognized in Chang 8 sandstones, Ordos basin. Carbonate cement in Chang 8 sandstones is closely related to the dissolved carbon from thermal maturation of organic matters. Carbonate cement in the loosely packed framework grains precipitated shortly after deposition, and late-stage ferroan calcite and ferroan dolomite formed with progressive burial. The early diagenetic carbonate cement is partially to completely replaced by late-stage ferroan calcite and ferroan dolomite. Carbonate cement is much more commonly observed in sand bodies adjacent to Chang 7 source rocks. With increasing distance from the Chang 7 oil layers, the carbonate cement content gradually decreases. However, some tight carbonate cemented zones also occur at the sandstone-mudstone interfaces. Dissolution of Ca-feldspars by organic acids-rich fluids, together with clay mineral transformations such as illitization of smectite, would provide Ca 2+ and Mg 2+ ions for carbonate cementation. Organic acids and CO 2 rich fluids would charge into the reservoirs with the hydrocarbons, and when the CO 2 and acids were buffered by the framework grain dissolution, carbonate cement would precipitate with a decrease in CO 2 concentration.

show abstract

Section: Isotope Analysis and Origins Of Carbonate Cementmentioning

confidence: 96%

Section: Carbonate Cementmentioning

confidence: 99%

Origin and Distribution of Carbonate Cement in Tight Sandstones: The Upper Triassic Yanchang Formation Chang 8 Oil Layer in West Ordos Basin, China

et al. 2017

Self Cite

View full text Add to dashboard Cite

show abstract

“…Lithofacies were distinguished on the basis of core observations of both large‐scale and small‐scale features and microscopic imaging of texture, composition, lithology and diagenesis, and even the dominant pore throat distribution from mercury injection capillary pressure data (Lai et al, in press; Rushing, Newsham, & Blasingame, ). For the purpose of this study, six major types of lithofacies are identified on the basis of detailed microscopic petrographic observations, including framework grains, diagenetic minerals (quartz, carbonate, and clay minerals), grain size and sorting, clay matrix content, and pore systems (e.g., Lai, Wang, Chai, & Ran, ; Lai et al, ).…”

Section: Resultsmentioning

confidence: 99%

Diagenesis and reservoir quality in tight gas sandstones: The fourth member of the Upper Triassic Xujiahe Formation, Central Sichuan Basin, Southwest China

Lai

Wang

Cai³

et al. 2017

Geological Journal

Self Cite

View full text Add to dashboard Cite

Mineralogical, petrographic, and geochemical analyses were performed to investigate the sandstone composition and texture, pore system, and diagenetic minerals of Upper Triassic sandstones in the Central Sichuan Basin, Southwest China. The results show that authigenic quartz, clay minerals, and carbonates are the main pore‐filling constituents. The pore systems consist of intergranular porosity, secondary porosity, microporosity, and microfractures. Loss of depositional porosity is greater due to compaction than to cementation. Eodiagenesis includes mechanical compaction, precipitation of early calcite cements, kaolinite, and smectite, and leaching of feldspars by meteoric water. Mesodiagenesis consists of compaction, framework grain dissolution, and subsequent precipitation of illite, quartz, and late carbonate cements. Six lithofacies were identified on the basis of petrographic analyses, namely, (a) argillaceous sandstones; (b) poorly sorted sandstones; (c) quartz‐cemented sandstones; (d) carbonate‐cemented sandstones; (e) clay‐mineral‐cemented sandstones, and (f) clean sandstones with abundant secondary porosity. The best reservoir‐quality rocks have high percentages of detrital quartz but low percentages of matrix, quartz, and carbonate cement. Differences in textural and compositional attributes of various lithofacies significantly affect porosity‐depth trends. The diagenetic evolution pathways and reservoir‐quality prediction models of various lithofacies are reconstructed by integrated petrographic data. This work provides insights into describing the different lithofacies by petrographic analysis and helps to investigate how detrital composition and texture influence the diagenesis and reservoir quality evolution in tight gas sandstones.

show abstract

“…Quartz cement is considered as a negative contributor to deeply buried reservoirs (Islam, 2009), and it destroys pores with the increasing burial depth and temperature (Lai, Wang, Chai, et al, 2017;Walderhaug, 2000;. The replacement of quartz grains by carbonates, transformation of clay minerals, and alteration of feldspars are reported as the main sources for silica (Kim, Lee, & Hisada, 2007;Salem, Morad, Mato, & Al-Aasm, 2000).…”

Section: Quartzmentioning

confidence: 99%

Diagenesis and reservoir quality of sandstones in the Eocene Shahejie Formation, Raoyang Sag (Jizhong Depression), Bohai Bay Basin, China

et al. 2019

View full text Add to dashboard Cite

Deeply buried (3.5–4.5 km) fan deltaic and braided deltaic sandstones of the Eocene Shahejie Formation are important hydrocarbon reservoirs in the Raoyang Sag of the Bohai Bay Basin (North China). An integrated approach incorporating petrophysics, thin‐section petrography, scanning electron microscope (SEM), cathodoluminescence (CL), and well log analysis was applied to investigate diagenesis, diagenetic minerals, and their impacts on reservoir quality. The sandstones of the Sha‐3 (the third Member of the Shahejie Formation) are dominated by lithic arkoses and arkoses with a low‐moderate compositional maturity and a moderate textural maturity. The pore systems are dominated by secondary pores resulting from dissolution of framework grains, micropores among authigenic clays, and minor amounts of primary intergranular pores. Chemically unstable framework grains such as feldspar and lithic fragments experienced alteration and resulted in formation of authigenic kaolinite. Dissolution and alteration of feldspars and rock fragments and pressure solution of detrital quartz grains were the main sources for quartz cements. Mechanical compaction and cementation by calcite, dolomite, quartz, kaolinite, and mixed‐layer illite/smectite destroyed primary pores, whereas dissolution of framework grains generated secondary pores. Five types of diagenetic facies are identified based on framework mineralogy, texture, diagenetic minerals, and pore systems. These comprise the following: (a) quartz‐cemented sandstone, (b) tightly compacted sandstone, (c) carbonate‐cemented sandstone, (d) clay‐mineral‐cemented sandstone, and (e) clean dissolved sandstone. Diagenetic processes and evolution sequences for the five diagenetic facies were reconstructed based on textural relationships from thin section, SEM, and CL studies. The reservoir quality evolution of various diagenetic facies is predicted by considering variations in grain size, sorting, shape, and matrix content of sandstones. This work, which investigates the diagenetic sequence of sandstones, will provide insights into reservoir quality prediction for low‐permeability sandstones with similar tectono‐depositional settings.

show abstract

Deep burial diagenesis and reservoir quality evolution of high-temperature, high-pressure sandstones: Examples from Lower Cretaceous Bashijiqike Formation in Keshen area, Kuqa depression, Tarim basin of China

Cited by 114 publications

References 63 publications

Origin and Distribution of Carbonate Cement in Tight Sandstones: The Upper Triassic Yanchang Formation Chang 8 Oil Layer in West Ordos Basin, China

Origin and Distribution of Carbonate Cement in Tight Sandstones: The Upper Triassic Yanchang Formation Chang 8 Oil Layer in West Ordos Basin, China

Diagenesis and reservoir quality in tight gas sandstones: The fourth member of the Upper Triassic Xujiahe Formation, Central Sichuan Basin, Southwest China

Diagenesis and reservoir quality of sandstones in the Eocene Shahejie Formation, Raoyang Sag (Jizhong Depression), Bohai Bay Basin, China

Contact Info

Product

Resources

About