Organic geochemical signatures of source rocks and oil-source correlation in the Papuan Basin, Papua New Guinea

Xu, Min; Hou, Dujie; Lin, Xiubin; Liu, Jian; Ding, Wenjing; Xie, Rui

doi:10.1016/j.petrol.2021.109972

Cited by 9 publications

(4 citation statements)

References 52 publications

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“…Therefore, the presence of de-A-lupane in Polaman sediments affirmed the organic origin from higher terrestrial plants Angiosperms and the presence of bacterial input during sediment deposition [37,39]. This result was also supported by the presence of similar biomarkers in the Bikaner, Nagaur, Jalore, Jaisalmer, and Barmer districts of Rajasthan, western India, and Papua Basin, Papua New Guinea, as indicators of sources of terrestrial higher plant organic matter [40][41]. The origin of organic compounds from Angiosperms was also affirmed by the presence of olean-12-ene compounds in PLM 1, 2, 3, and 5 which derived from β-amirin as a precursor.…”

Section: Triterpenoidmentioning

confidence: 57%

“…Based on the m/z 257 fragmentogram, the 1,2,4a,9tetramethyl-1,2,3,4,4a,5,6,14b-octahydropysene and 2,2,4a,9-tetramethyl-1,2,3,4,4a,5,6,14b-octahydropycene were observed in PLM 1, PLM 2, and PLM 3. These two compounds indicated that organic matter originated from β-amyrin and α-amyrin as precursors in higher plants Angiosperms [10,40]. The presence of these compounds 1,2,9-trimethyl-1,2,3,4-tetrahydropicene and 2,2,9trimethyl-1,2,3,4-tetrahydropycene in the analyzed Polaman samples proved of the vascular plant as the source of organic matter [10,53,60].…”

Section: Pentacyclic Aromatic Triterpenoidsmentioning

confidence: 90%

“…The pentacyclic triterpenoid aromatic compounds in Polaman sediments were identified based on the fragmentograms m/z 145, 257, 295, 324, and 356 [10,12,38,40]. The dinoroleane-1,3,5 (10),12-tetraene, and dinoroleane-1,3,5(10)-triene in PLM 1, PLM 2, PLM 3, and PLM 5 were studied according to the specific fragmentogram m/z 145.…”

Section: Pentacyclic Aromatic Triterpenoidsmentioning

confidence: 99%

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Organic Geochemical Characteristics of Ngrayong Formation Polaman Sediment Rock, Northeast Java Basin-Indonesia

Zetra,

Burhan,

Sulistiyono

et al. 2023

Indones. J. Chem.

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A study of the sedimentary rocks of the Ngrayong formation has been carried out on five samples from the Polaman outcrop point to determine the potential of coal as a source rock for producing oil and gas through GC-MS analysis. Biomarker analysis shows the presence of n-alkanes (C16-C36) with a bimodal distribution, indicating that the source of organic material in sedimentary rocks comes from bacteria, algae, and vascular plants, which is supported by several parameters such as CPI, OEP, LHCPI, wax index, ACL and AlkTerr values. This dominant source of terrigenous organic matter is also proven by the TAR value, C31/C19, C29/C17 ratio, and several aromatic compounds and their derivatives. Bacterial input as an organic source of allouchtonic sedimentary rocks is also proven by the presence of hopanoid, de-A-lupane biomarkers, and C17/C31 ratio. The oxic deposition environment is indicated by the Pr/Ph ratio. CPI and OEP parameters, C29 bb/ab ratio > 0.15 and C31 22S/(22S+22R) < 1 indicate low maturity of the sediment sample. Several parameters and the presence of biomarkers stated above conclude that Ngrayong coal as a source rock has the potential to produce oil and gas.

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Section: Triterpenoidmentioning

confidence: 57%

Section: Pentacyclic Aromatic Triterpenoidsmentioning

confidence: 90%

Section: Pentacyclic Aromatic Triterpenoidsmentioning

confidence: 99%

See 1 more Smart Citation

Organic Geochemical Characteristics of Ngrayong Formation Polaman Sediment Rock, Northeast Java Basin-Indonesia

Zetra,

Burhan,

Sulistiyono

et al. 2023

Indones. J. Chem.

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“…The correlation of sterane isomerization parameters presents input OM from produced water samples all in the mature stage ( Figure 5 c), and the source rocks have entered the oil generation window. 35 − 37 According to the triangle diagram of sterane (C 27 , C 28 , C 29 ) content ( Figure 5 d), it can be inferred that DFS-45, DFS-69, DFS-128, and DFS-133 mainly derive their parent material inputs from plankton, whereas DFS-148 and DFS-M68 exhibit mixed sources.…”

Section: Discussionmentioning

confidence: 99%

Evidence of Coal Biodegradation from Coalbed-Produced Water – A Case Study of Dafosi Gas Field, Ordos Basin, China

Bao,

Hu,

Huang

et al. 2023

ACS Omega

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Bioconversion of coal to methane occurs in the coalbed aquifer environment. To investigate the evidence of coal biodegradation from coalbed-produced water, we collected six field water samples from the Dafosi gas field and prepared one laboratory-simulated water sample and one indoor anaerobic microbial degradation sample with the highest compound concentration as the two reference standards. Gas chromatography−mass spectrometry was used to detect the organic compound type, concentration, and differences in the biomarker compound sensitivity. Results indicate that extracted organic matter from coalbed-produced water samples can be evidence of biodegradation. Variations in range compounds (such as n-alkanes, tri-and pentacyclic terpenes, and steranes) and their sensitivity confirmed active microbial degradation in the studied area. A positive correlation between the n-alkanes content in the coalbed-produced water and the stable carbon isotope value of methane further verifies that the n-alkanes are primary substrates for maintaining microbial activity. Therefore, evidence including n-alkanes, tri-and pentacyclic terpenes, steranes, unresolved complex mixtures, and stable carbon isotope composition of methane contribute to biogenic methane generation in situ. Our limited data suggest that managing soluble organic matter in the coalbed-produced water may provide a viable route for coal biodegradation since most microorganisms survive within the coal seam water.

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Geology of Mudstones Atop the Sangonghe Formation, Shuixigou Group, Turpan‐Hami Basin: New Insights and Their Implications for Petroleum Geology

Wang,

Hu,

Chen

et al. 2024

Geological Journal

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As the exploration of deep‐seated oil and gas resources in the Turpan‐Hami Basin intensifies, there is an urgent need to thoroughly depict the geological characteristics of newly uncovered, underexplored strata in sub‐sag centers. This study undertakes the inaugural systematic geochemical analysis of mudstones atop the Sangonghe Formation, including palynological identification, maceral identification, biomarker analysis, total organic carbon (TOC) analysis, and pyrolysis. The findings reveal that the mudstone sequence, as the target layer, was deposited in a warm and moist paleoclimate and a weakly reducing to weakly oxidising saline water environment, fostering the growth of prolific algae and bacteria, thus ensuring substantial foundational materials for source rock formation. The organic matter in the mudstone sequence displays pronounced laminar accumulation. Despite the overall modest abundance, the organic matter features notable hydrocarbon‐generating potential per unit of organic carbon and favourable types. Humic‐sapropelic kerogens (type II1) are found in the mudstones, with organic matter generally reaching a mature to highly mature stage. These characteristics establish the mudstones as effective source rocks, furthermore, the hydrocarbon expulsion in the Xishanyao Formation precedes that of the Sangonghe Formation and that both formations constitute a sequential process in terms of hydrocarbon generation and expulsion timing and hydrocarbon contribution. Reanalyzing this mudstone sequence not only revises prior geological understanding of it as direct cap rocks, but also facilitates the reclassification of deep‐seated strata into three distinct petroleum systems. Centered around this source rock layer, dual modes, namely the “lower‐source rock and upper‐reservoir” and the “ lower‐reservoir and upper‐source rock” modes can be formed. These new insights will offer profound implications for hydrocarbon resource evaluation and future hydrocarbon exploration endeavours in the Shuixigou Group within the Taibei sag.

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Organic geochemical signatures of source rocks and oil-source correlation in the Papuan Basin, Papua New Guinea

Cited by 9 publications

References 52 publications

Organic Geochemical Characteristics of Ngrayong Formation Polaman Sediment Rock, Northeast Java Basin-Indonesia

Organic Geochemical Characteristics of Ngrayong Formation Polaman Sediment Rock, Northeast Java Basin-Indonesia

Evidence of Coal Biodegradation from Coalbed-Produced Water – A Case Study of Dafosi Gas Field, Ordos Basin, China

Geology of Mudstones Atop the Sangonghe Formation, Shuixigou Group, Turpan‐Hami Basin: New Insights and Their Implications for Petroleum Geology

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