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

2021 ◽  
Author(s):  
Zhouqiang Zeng ◽  
Xuanlong Shan ◽  
Guoli Hao ◽  
Wentong He ◽  
Changqing Zheng ◽  
...  
Keyword(s):  
Natural Gas ◽  
Pore Size ◽  
Metamorphic Rock ◽  
Oil And Gas ◽  
Songliao Basin ◽  
Hydrocarbon Exploration ◽  
Gas Reservoir ◽  
Pore Characteristics ◽  
Pore Size Distributions ◽  
Exploration And Development

Abstract 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.

RISING COSTS IN AUSTRALIAN HYDROCARBON EXPLORATION AND DEVELOPMENT

1978 ◽  
Vol 18 (1) ◽  
pp. 204
Author(s):  
D. McMinn
Keyword(s):  
Large Scale ◽  
Oil And Gas ◽  
Hydrocarbon Exploration ◽  
Upward Movement ◽  
Oil And Gas Producers ◽  
Project Construction ◽  
Key Factor ◽  
Retained Earnings ◽  
Equipment Costs ◽  
Exploration And Development

Rapidly rising costs have created operating and investment problems for companies involved in the Australian hydrocarbon resource industry. Expenditure in this area has declined markedly in constant dollar terms, an adverse trend given Australia's outlook for increasing reliance on imported crude oil in the 1980's.Costs in hydrocarbon exploration appear to have risen in excess of general inflation in the Australian economy. This situation may be attributed to the strong upward movement in wages and equipment costs, and in some cases, the low level of domestic exploration in the mid-1970's.Capital costs for hydrocarbon development and pipeline projects in Australia have also escalated, a trend caused by rising wage levels in project construction and increases in equipment costs. Additional factors such as design alterations, environmental considerations and labour disputes, can also add significantly to costs. Large scale hydrocarbon projects, which have long lead times, are susceptible to inflationary trends.Increasing amounts of funds are required for exploration and development as a result of the rising cost trend. However, difficulty is being experienced in raising funds through capital and equity markets, as well as retained earnings. A key factor in securing adequate funds is profitability, which is largely determined by the State and Federal Governments. For the smaller oil and gas producers, the past profitability record has been inadequate, although the improvement in recent years should continue because of higher oil and gas prices.Costs may be expected to continue to increase in hydrocarbon exploration and development, but probably at a lower rate than experienced in the mid- 1970's. The future viability of the hydrocarbon sector is dependent on a favourable investment environment and higher profitability to offset the considerable risks in exploration and escalation in costs.

Cementitious Sealing Material: 3D Digital Image Based Characterization of Pore Size Distribution and Modeling of Transport Properties

2013 ◽  
Author(s):  
Neven Ukrainczyk ◽  
Eduardus A. B. Koenders ◽  
Klaas van Breugel
Keyword(s):  
Pore Size ◽  
Transport Properties ◽  
Digital Image ◽  
Oil And Gas ◽  
Transport Model ◽  
Medial Axis ◽  
Three Dimensional ◽  
Cementitious Materials ◽  
Pore Size Distributions

Exhausted oil and gas reservoirs are one of the most potential storage facilities to sequestrate the worlds CO2. These reservoirs are sealed with cementitious materials, that should have a long time performance. Therefore, this paper emphasizes the characterization of the evolving capillary pore network and transport properties of the cementitious microstructure used to seal the wellbore. The Hymostruc numerical model is employed to simulate the development of an evolving virtual microstructure of cementitious materials. The simulated 3D microstructures were then digitized to form a matrix of cubic voxels. The pore-size distributions of the obtained virtual microstructures were calculated using a combination of three-dimensional digital image processing algorithms: 1) distance transform and 2) medial axis thinning algorithm to obtain a 3D skeleton of the pore structure. Transport properties of the simulated microstructures are analyzed employing a finite difference 3D transport model. The modeling results are compared with available literature results.

100 Years of Oil and Gas Development: From the Marshes to Deepwater, Louisiana Has Played a Major Role in Water-Oriented Exploration and Development

2002 ◽  
Author(s):  
Donald W. Davis
Keyword(s):  
Gulf Of Mexico ◽  
Oil And Gas ◽  
100Th Anniversary ◽  
The State ◽  
Hydrocarbon Exploration ◽  
Oil And Gas Development ◽  
Energy Demands ◽  
Entrepreneurial Spirit ◽  
Water Depths ◽  
Exploration And Development

September, 2001 marked the 100th anniversary of the oil and gas business in Louisiana. Consequently, hydrocarbon exploration and development has been a vital part of Louisiana’s economy for over a century. In the latter part of the 1980s, the industry was considered dead or dying. Exploration and development had declined throughout the state. In the 1990s Louisiana’s industry was reborn in the deepwater of the northern Gulf of Mexico—a region that holds enormous potential in water depths that create unique exploration, development and production challenges. As technology changed, or was developed to meet the industry’s needs, new frontiers were explored. There was a pioneering entrepreneurial spirit that pushed the limits. Today, the frontier continues to expand and Louisiana is the beneficiary of this activity. One hundred years after the first discovery well in Louisiana, more than 250,000 oil and/or gas wells have been drilled in the state. In addition, over 4,000 structures are anchored parallel to its coast in water depths approaching two miles (3.2 km). From the uplands, to the swamps and marshes and into the deepwater of the Gulf of Mexico, Louisiana has been a leader in helping meet the Nation’s energy demands.

A New Method for Quantitative Calculation of the Reservoir Thickness

2011 ◽  
Vol 347-353 ◽  
pp. 1696-1700
Author(s):  
Zhan Tao Xing ◽  
Kai Yuan Chen
Keyword(s):  
Oil And Gas ◽  
Close Contact ◽  
Seismic Exploration ◽  
Initial Model ◽  
Gas Reservoir ◽  
Oil And Gas Exploration ◽  
Quantitative Calculation ◽  
High Resolution Sequence Stratigraphy ◽  
Oil And Gas Reservoir ◽  
Exploration And Development

Thickness of reservoir has a direct and close contact with oil and gas exploration and development, reservoir thickness is directly related to success and failure of the exploration and development. The main problem of the Seismic exploration is the limit of the resolution, geophysical workers have done a lot work, but the effect has been not obvious. Mainly to the following questions: 1、it is difficult to determine the boundaries of the reservoir；2、the limits of the resolution still exists. In this paper, through the study of the high-resolution sequence Stratigraphy and fine calibration, we used the sequence boundary and flooding surface to build the initial model, and then the density inversion was done to indentify the oil and gas reservoir. On the basis of the inversion, the density ranges of the sandstone in the sequence were calculated through geostatistics, and then we correctly calculated the thickness of the sandstone in every sequence, in this way we not only solved the problem of reservoir boundaries, but also improved the resolution.

scholarly journals RECENT DECISIONS AFFECTING THE DEVELOPMENT OF THE MARCELLUS SHALE IN PENNSYLVANIA

2011 ◽  
Vol 72 (4) ◽  
Author(s):  
Kevin C Abbott ◽  
Nicolle R Snyder Bagnell
Keyword(s):  
Natural Gas ◽  
Oil And Gas ◽  
Marcellus Shale ◽  
Case Law ◽  
Federal Courts ◽  
Oil And Gas Operations ◽  
History Of ◽  
Exploration And Development

Pennsylvania has a long history of natural gas exploration and development beginning in the 1800's. Despite having some of the country's oldest jurisprudence dealing with oil and gas disputes, Pennsylvania case law regarding oil and gas operations is relatively undeveloped in comparison to states like Texas and Oklahoma. With the boom in leasing and developing in the region in the last few years, there has also been an increase in oil and gas litigation in Pennsylvania state and federal courts. This paper will discuss the recent decisions that have impacted the development of Marcellus law in Pennsylvania, as well as identify some of the significant pending issues that are worth watching.

Dynamic streaming potential coupling coefficient in porous media with different pore size distributions

2021 ◽  
Author(s):  
Luong Duy Thanh ◽  
Damien Jougnot ◽  
Santiago G Solazzi ◽  
Nguyen Van Nghia ◽  
Phan Van Do
Keyword(s):  
Porous Media ◽  
Pore Size ◽  
Coupling Coefficient ◽  
Oil And Gas ◽  
Complex Function ◽  
Streaming Potential ◽  
Pore Fluid ◽  
Published Data ◽  
Size Distributions ◽  
Pore Size Distributions

Summary Seismoelectric signals are generated by electrokinetic coupling from seismic wave propagation in fluid-filled porous media. This process is directly related to the existence of an electrical double layer at the interface between the pore fluid and minerals composing the pore walls. The seismoelectric method attracts the interest of researchers in different areas, from oil and gas reservoir characterization to hydrogeophysics, due to the sensitivity of the seismoelectric signals to medium and fluid properties. In this work, we propose a physically-based model for the dynamic streaming potential coupling coefficient (SPCC) by conceptualizing a porous medium as a bundle of tortuous capillaries characterized by presenting different pore size distributions (PSD). The results show that the dynamic streaming potential coupling coefficient is a complex function depending on the properties of pore fluid, mineral-pore fluid interfaces, microstructural parameters of porous media and frequency. Parameters influencing the dynamic SPCC are investigated and explained. In particular, we show that the PSD affects the transition frequency as well as the shape of the SPCC response as a function of frequency. The proposed model is then compared with published data and previous models. It is found that the approach using the lognormal distribution is in very good agreement with experimental data as well as with previous models. Conversely, the approach that uses the fractal distribution provides a good match with published data for sandstone samples but not for sand samples. This result implies that the fractal PSD may not be pertinent for the considered sand samples, which exhibit a relatively narrow distribution of pore sizes. Our proposed approach can work for any PSD, for example, including complex ones such as double porosity or inferred from direct measurements. This makes the proposed models more versatile than models available in literature.

scholarly journals Accumulation and Distribution of Natural Gas Reservoir in Volcanic Active Area: A Case Study of the Cretaceous Yingcheng Formation in the Dehui Fault Depression, Songliao Basin, NE China

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-17
Author(s):  
Fancheng Zeng ◽  
Bo Liu ◽  
Changmin Zhang ◽  
Guoyi Zhang ◽  
Jin Gao ◽  
...  
Keyword(s):  
Organic Matter ◽  
Natural Gas ◽  
Volcanic Rocks ◽  
Songliao Basin ◽  
Exploration And Exploitation ◽  
Gas Reservoirs ◽  
Tight Sandstone ◽  
Gas Reservoir ◽  
Yingcheng Formation ◽  
Pore Types

Tight gas sandstone and volcanic gas reservoirs have received global attention in the energy arena for further exploration and exploitation attempts. Considering the Yingcheng Formation of Dehui fault depression in the Songliao Basin as an example, this study focused on the accumulation and distribution of natural gas reservoirs in volcanic area in a fault depression basin. Volcanic activities occurred in the Yingcheng Formation, which is distributed centrally in the northwest of the study area. During the sedimentation of the Yingcheng Formation, fan-delta, lacustrine, and nearshore subaqueous fan facies were deposited. The source rocks of the Yingcheng Formation have high abundance of organic matter mainly in type III at high-overmature stages, indicating favorable conditions for gas production. The porosity of volcanic reservoir is 3.0%-14.8%, the permeability is 0.0004 mD-2.52 mD, and the pore types are mainly secondary dissolved pores and fractures. Besides, the porosity of the tight sandstone reservoir is 0.5%-11.2%, and the permeability is 0.0008 mD-3.17 mD. The pore types are mainly interparticle pores, with a small proportion of intraparticle pores and microfractures. The intrusion of late volcanic magma provided sufficient heat for the thermal maturity progression of organic matter in Yingcheng Formation and promoted the generation of natural gas in large quantities. Volcanic rocks formed at the early and middle stages of volcanic activities occupied the sedimentary space and hindered the development of sedimentary sand bodies to a certain extent. However, volcanic rocks can become the seal to promote the formation of tight sandstone gas traps. Comparing tight sandstone reservoirs with volcanic ones, the latter are less affected by compaction; thus, their petrophysical properties do not vary much with depth, showing more homogeneous characteristics. The pyroclastic rocks influenced by volcanic activity and the secondary pores formed by dissolution in the later stages also provide reservoir space for gas accumulation. Ultimately, the tight sandstone and volcanic rocks in the study area form a complex gas reservoir system, which can become a reference for exploration and exploitation of natural gas in other petroliferous fault depressions that are affected by volcanisms.

scholarly journals Phase Behavior Identification and Formation Mechanisms of the BZ19-6 Condensate Gas Reservoir in the Deep Bozhong Sag, Bohai Bay Basin, Eastern China

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-19
Author(s):  
Zhenliang Wang ◽  
Shengdong Xiao ◽  
Feilong Wang ◽  
Guomin Tang ◽  
Liwen Zhu ◽  
...  
Keyword(s):  
Critical Temperature ◽  
Natural Gas ◽  
Phase Behavior ◽  
Oil And Gas ◽  
Eastern China ◽  
Bohai Bay ◽  
Bohai Bay Basin ◽  
Gas Reservoir ◽  
Gas Field ◽  
Gaseous Hydrocarbons

Significant developments have been observed in recent years, in the field of deep part exploration in the Bozhong Sag, Bohai Bay Basin in eastern China. The BZ19-6 large condensate gas field, the largest gas field in the Bohai Bay Basin, was discovered for the first time in a typical oil-type basin. The proven oil and gas geological reserves in the deeply buried hills of the Archean metamorphic rocks, amount to approximately 3 × 10 8 tons of oil equivalent. However, the phase behavior and genetic mechanisms of hydrocarbon fluids are still unclear. In this study, the phase diagram identification method and various empirical statistical methods, such as the block diagram method, φ 1 parameter method, rank number method, and Z -factor method were implemented to comprehensively identify the phase behavior types of the BZ19-6 condensate gas reservoir. The genetic mechanism of the BZ19-6 condensate gas reservoir was investigated in detail through analyses of physical properties of the fluid at high temperatures and pressures, organic geochemical characteristics of condensate oil and gas, and regional tectonic background. Consequently, this study is shown as follows: (1) The BZ19-6 condensate gas reservoir is a part of a secondary condensate gas reservoir with oil rings, formed synthetically since the Neogene period due to multiple factors, such as retrograde evaporation from deep burial and high temperature, inorganic CO2 charging from the deep mantle, and late natural gas invasion. (2) The hydrocarbon accumulation process of the BZ19-6 condensate gas reservoir is as follows: First, a large amount of oil is accumulated at the end of the lower Minghuazhen deposition (5 Ma BP); second, a large amount of natural gas is generated in the deep-source kitchen and mantle-derived inorganic CO2 charged into the early formed oil reservoirs at the end of the upper Minghuazhen deposition (2 Ma BP). As a result, the content of gaseous hydrocarbons in the hydrocarbon system of the reservoir increased, which led to large amounts of liquid hydrocarbons dissolved in gaseous hydrocarbons and significantly reduced the critical temperature of the hydrocarbon system. Therefore, existing secondary condensate gas reservoirs are formed when the critical temperature is lower than the formation temperature and it enters the critical condensate temperature range.

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