The abundant nanopores in shale make it an unconventional reservoir for oil and gas. Matrix compressibility heterogeneity are crucial fluid accumulation migration, yet these two properties remain unclear reservoirs. Herein, we investigated the matrix compressibility, multifractal properties, their geological governing factors nanoporous Yanchang from Ordos Basin, China, utilizing petrophysical experiments, mercury injection capillary pressure (MICP), low-pressure gas adsorption. Furthermore,...

Cost-effective pore characterization is essential for understanding gas storage and flow in shale reservoirs. Herein, we thoroughly investigated the structure of Qiongzhusi from Northeastern Yunnan, China, utilizing field emission scanning electron microscopy, high-pressure mercury intrusion porosimetry (HP-MIP), low-pressure adsorption (LP-N2/CO2GA). Scale-dependent fractal properties were identified to evaluate applicability fluid methods. Furthermore, geological factors controlling...

Tectonism is one of the major controlling factors shale gas accumulation and enrichment in China. To explore relationship between tectonism composition pore characteristics reservoirs, this research carried out mineralogy tests, organic geochemistry field emission scanning electron microscopy (FE-SEM) experiments, low-pressure adsorption (LPGA, N 2 CO ) experiments on samples various deformation intensities from Southwestern Based FE-SEM image analyses, it can be found that there are large...

Kerogen micropores in shale are crucial for gas sorption; nevertheless, their formation and evolution have been insufficiently studied. To qualitatively quantitatively analyze changes the molecular structure associated of kerogen throughout natural maturation, a series experiments were performed on collected samples with varying maturity levels. The results demonstrated that chemical can be divided into three stages during thermal evolution. When Ro < 1.43%, primarily controlled by...

Gas sorption characteristics are crucial in assessing gas-in-place and hydrocarbon recovery potential coal reservoirs. This study combines experimental theoretical approaches to investigate ethane behavior coals. Results show that volume exhibits a positive correlation with gas pressure. The Langmuir model demonstrates effectiveness determining isotherms surface coverage. estimated values of range from 28.32 36.84 cm3/g, the pressures lie between 0.21 0.25 MPa. Moreover, novel model, first...

Ascertaining the pore geometry and wettability characteristics of tight shales is great significance for revealing mechanisms occurrence, migration, production shale resources. Taking Bossier Shale collected from Well A, East Texas, USA, as an example, behavior in a broad nm−μm scale spectrum were quantified based on integrated techniques, including water immersion porosimetry (WIP), mercury intrusion (MIP), (ultra)small-angle X-ray scattering [(U)SAXS], contact angle, liquid spontaneous...

Kerogen molecular structure controls the micropore (<2 nm diameter) evolution in shale and exerts a significant impact on gas adsorption, desorption, diffusion. However, influence of tectonic deformation kerogen organic micropores needs intensive study. Our study mainly focuses transformations extracted Longmaxi during deformation. Vitrinite reflectance measurement (VRM) Raman spectroscopy (RS) were utilized to determine maturity matter. Organic pore network attributes samples estimated...

The characteristics, distribution, and preservation of pores are vital in controlling the storage distribution shale gas. Qiongzhusi Formation shales taken from different members with similar tectonic thermal evolutions were used to evaluate response pore characteristics minerals sealing systems using field-emission scanning electron microscopy gas adsorption. Because differences mineral structure arrangement, feldspar, organic matter (OM)-clay, OM-rutile, OM-apatite aggregates facilitate...

Pore structure plays an important role in the preservation and migration of shale gas. The pore samples from lower Palaeozoic Lujiaping Longmaxi Formations northeastern Chongqing was characterized by image analysis fluid injection, porosity, homogeneity, roughness were studied using various fractal methods. results indicate that compared with facies Formation, Formation has more developed organic matter pores, smaller macropore (>50 nm) volumes, specific surface areas, mesopore (2–50 larger...

The Taiyuan Formation, located on the northern margin of Ordos Basin, has an important role in reconstructing tectonic paleogeography and evolutionary process due to its preservation information about evolution basin throughout Late Paleozoic. provenance, paleogeography, activity traits Formation were examined using sedimentary petrology zircon chronology methods. Alxa block is consistent with dating results Shabatai, Daqing Shan Xiachengwan Adaohai. It inferred that provenance western part...

The organic-enriched thick shale at the bottom of Longmaxi Formation is laterally continuous distributed and has been proven to be good production capability in Fuling Upper Yangtze. Uplifts that developed during sedimentation influenced reservoir characteristics by taking control sedimentary environment provenance. environments are mainly deep-water shelf, shallow-water tidal flat. By analyzing characteristic these three environments, which dominated early stage sedimentation, formed a...

Due to breakthroughs in the Lower Silurian Longmaxi Formation Sichuan Basin and multiple strata around basin, northern part of Guizhou adjacent has become a key area for shale gas exploration. Compared with Formation, Niutitang displays greater TOC (total organic carbon) content, depositional thickness distribution area, but details remain undetermined. In study Cambrian typically high maturity brittle mineral content. The experienced periods tectonic movement, which have great influence on...

Accurately determining the adsorption capacity of Longmaxi shale in complex structural areas is crucial for evaluating gas resources northeastern Chongqing. However, studies on pore characteristics and methane these shales are currently limited. In this paper, we collected core samples from YDB-1 well Chongqing determined structure using low-pressure high-temperature, high-pressure experiments, respectively. The results indicate that significantly positively correlated with organic matter...

In-situ pyrolysis of tar-rich coal can alleviate the external dependence oil and gas in China, achieve efficient safe exploitation coal. In fact, nano-pores heterogeneity undergo significant changes during pyrolysis, but there is currently limited research, which seriously restricts utilization this study, pore characteristics were studied by microwave experiment, adsorption results multifractal theory, evolution mechanism pores was proposed. The show that significantly promoted development...

Accurately determining the pore structure and heterogeneity characteristics of marine-continental transitional shale in Taiyuan Formation is crucial for evaluating gas resources northern Ordos Basin. However, studies on shales isolated kerogen are limited. This study collected Basin, corresponding from used N2 CO2 adsorption experiment Frenkel–Halsey–Hill Volume-Specific Surface Area model to investigate both. The results show that dominated by micropores, micropore’s specific surface area...

<title>Abstract</title> Accurately determining the pore structure and heterogeneity characteristics of marine-continental transitional shale in Taiyuan Formation is crucial for evaluating gas resources northern Ordos Basin. However, studies on shales isolated kerogen are limited. This study collected Basin corresponding from shale, used N₂ CO₂ adsorption experiment Frenkel-Halsey-Hill Volume-Specific Surface Area model to investigate both. The results show that...

The establishment of molecular structure modeling is an important means to study the pore characteristics shale organic matter and significant for molecular-level simulations gas storage diffusion. Using

Shales are widely developed in the strata of Carboniferous-Permian coal measures Qinshui Basin, and these shales have great potential for shale gas exploration. In this paper, Taiyuan Formation eastern Basin studied. The study area investigated through field investigation, organic geochemical testing, X-ray diffraction, scanning electron microscopy, high pressure mercury injection, low temperature liquid nitrogen adsorption PetroMod simulation other tests to reservoir characteristics, such...