Pore structure is the most important factor affecting reservoir quality and petrophysical property of tight reservoir. The effective characterization pore structures, including radius distribution (PRD), throat (TRD), pore-throat (PTRD), relevant parameters, etc., great importance for oil exploration exploitation. Taking sandy conglomerate as research target reservoir, this paper characterizes structures by a combination experiments on parallel core samples. These include high-pressure...

Large-span roof structures are sensitive to wind loads, and the values taken by code usually cannot meet design requirements. By conducting scaled rigid model pressure tests on a large-span irregular in Xi'an, coefficients of cantilevered curved under different directions were systematically analyzed. The results show that is mainly subjected negative pressure, with local positive at eaves upper surface north building. Strong suction zones easily formed top south building structural strength...

Deep Wufeng–Longmaxi marine shale has abundant natural gas resources, but its complex tectonic characteristics lead to strong reservoir heterogeneity, limiting large-scale development. Herein, clarify the effects of tectonism on pore structure and quality in different regions, typical samples from high-steep anticline (HSA) broad-gentle syncline (BGS) were collected analyzed through field emission scanning electron microscopy (FE-SEM), adsorption, high-pressure mercury injection, desorption....

As the traditional polymer stabilizer is eliminated to improve injectability of foam in low-permeability reservoirs, stability, plugging capacity, conformance control and oil recovery performance surfactant-alternating-gas (SAG) become significantly important for determining its adaptability permeability heterogeneity, which were focused experimentally researched this paper. Results show that SAG bubbles are highly stable micron-sized channels porous media (than conventional unconstrained...

Gravels are widely distributed in the Baikouquan formation Mabei area of Junggar Basin. However, conventional logging methods cannot quantitatively characterize gravel development, which limits identification lithology, structure, and sedimentary facies this region. This study proposes a new method for automatically identifying gravels from electric imaging images calculating parameters utilizing salient object detection (SOD) network. Firstly, SOD network model (U2-Net) was constructed...

Shale gas is an important unconventional natural resource, and its reservoirs have pores with strong heterogeneity, which effect on the adsorption migration of shale gas, but specific mechanism still unclear. To further clarify pore structure characteristics their influence CH4 capacity, marine samples from Wufeng-Longmaxi formation wells N1, N3, N10 in Changning block, southern Sichuan Basin, China, were selected for total organic carbon (TOC), X-ray diffraction (XRD), N2 (N2-GA), (CH4-GA),...

The design of efficient reactors is very important to improve thhe economic benefit for the treatment organic wastewater. In this work, five types reactors, including batch stirring reactor (BSTR), continuous stirred tank (CSTR), tower reactor, folded plate and microtubule were investigated degrade phenolic wastewater by catalytic ozonation. CaO/Ca(OH)2 was used as ozonation catalyst. results show that rate dissolution aqueous O3 backmixing in are main factors hindering finally selected...

There are various sedimentary structures developed in the black shales of Upper Ordovician Wufeng Formation and Lower Silurian Longmaxi Luzhou area, southern Sichuan Basin, southwestern China. In order to evaluate controlling effects on key parameters shale reservoir properties, collected classification structures, scanning electron microscope observation, analysis fabric porosity characteristics, low‐pressure nitrogen adsorption, methane isothermal conventional triaxial compression test...

Lithological trap identification in thin sand and thick shale layers is still a challenge for hydrocarbon exploration. Based on the high-resolution sequence stratigraphy theory establishment of framework with seismic-well tie, dynamic deposition process braided delta sands late Cretaceous Yogou formation has been analyzed 62 wells passive rifting Termit basin multi-stages depressions reversals. (1) Six kinds sedimentary microfacies three major reservoir vertical stacking lateral migration...

This article presents a framework to integrate and optimize the design of large-scale wind turbines. Annual energy production, load analysis, structural components farm operation model are coupled perform system-level nonlinear optimization. As well as commonly used objective levelized cost (LCoE), key metrics engineering economics such net present value (NPV), internal rate return (IRR) discounted payback time (DPT) calculated objectives, respectively. The results show that IRR DPT have...

Lithological trap identification is still a challenge for thin layer reservoirs in thick shales. Based on the high resolution sequence stratigraphy theory and seismic structure analysis, framework established. With sedimentary facies analysis of 22 wells nearly 2300km2 Yogou 3D area, characteristics area are concluded. (1) Six kinds microfacies three major reservoir sands developed late Cretaceous formation early Paleogene Sokor formation. Submarine channels have "bell" or "box" shape GR,...

Complicated fluvial sands correlation and braided river models are still challenges for heterogeneous anisotropic reservoir evaluation petroleum development in oilfields. Based on high-resolution sequence stratigraphy sedimentology, core observation, the analysis of logging seismic data, framework Paleogene Yabus formation Palogue Oilfield, South Sudan is established, sedimentary characteristics rivers analyzed, (1) In deposits, channel bars usually pro-gradating seawards going thicker...

Power station steam turbine stage flow characteristics show that the relationship between pressure and flow, which was important research foundation for analysis of performance further optimization unit. Based on strict theory analysis, this article obtained two key characteristic coefficients such as capacity coefficient level group critical ratio mainly influenced characteristics. And then secondary calculation model imposed combining with massive actual data, adapting method improved PSO...

Complicated fluvial sands correlation and braided river models are still challenges for heterogeneous anisotropic reservoir evaluation in the world. Based on high resolution sequence stratigraphy sedimentology, with analysis of cores, logging seismic data, framework Paleogene Yabus formation Pal block Palogue Oilfield, South Sudan 3/7 Area is established, sedimentary characteristics rivers analyzed, (1) two kinds subfacies five microfacies deposits identified, including channel (i.e.,...

Abstract Fan plays the roles of forced draft fan, induced primary air seal and powder exhauster. As an important auxiliary fossil-fuel power station, its working environment is harsh. Timely efficient fault diagnosis can effectively reduce equipment failure shutdown losses, improve efficiency thermal generation. K-Nearest Neighbour (KNN) has good classification ability for non-stationary data samples. In response to shortcomings traditional KNN algorithm, this paper constructs a model based...