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| 1 | Response characteristics of array lateral logs and their primary inversion in reservoirs with fracture-induced anisotropy显示文摘为了识别,折断了水库并且决定他们有一个高定义的破裂参数穿 laterolog,我们与一个平行破裂组一起造了一个导致破裂的各向异性的形成模型。三维的有限元素方法被用来模仿数组 laterolog 的回答,然后主要倒置方法被利用。数字模拟证明当破裂间距是小的时,破裂组的数组 laterolog 反应与有宏观的电的 anisotropy 的形成的一样。数组 laterolog 的明显的抵抗力是近似与骨折相反地成正比孔。anisotropy 在折断的形成取决于破裂孔,它因此导致数组 laterolog 的反应变化。越高破裂剧降,越 larger 明显的抵抗力。当破裂剧降是低的时,深、浅的明显的抵抗力之间的差别是小的,并且当剧降高时,差别结果积极。破裂参数用 Marquardt 非线性的最少的广场方法被转换。结果,两个破裂孔和剧降在实际形成模型与参数显示出好匹配。这将在评估折断的水库支持数组 laterolog 的申请。 | Deng Shaogui Fan Yiren Li Zhiqiang Sun Qingtao | 2011 | Petroleum Science2011，8，1： | 4 |
| 2 | Integrated petrophysical log characterization for tight carbonate reservoir effectiveness: A case study from the Longgang area, Sichuan Basin, China显示文摘Ultra-low porosity and permeability, inhomogeneous fracture distribution, and complex storage space together make the effectiveness evaluation of tight carbonate reservoirs difficult. Aiming at the carbonate reservoirs of the Da'anzhai Formation in the Longgang area of the Sichuan Basin, based on petrophysical experiments and logging response characteristics, we investigated the storage properties of matrix pores and the characteristics of fracture development to establish a method for the characterization of effectiveness of tight reservoirs. Mercury injection and nuclear magnetic resonance (NMR) experiments show that the conventional relationship between porosity and permeability cannot fully reflect the fluid flow behavior in tight matrix pores. Under reservoir conditions, the tight reservoirs still possess certain storage space and permeability, which are controlled by the characteristic structures of the matrix porosity. The degree of fracture development is crucial to the productivity and quality of tight reservoirs. By combining the fracture development similarity of the same type of reservoirs and the fracture development heterogeneity in the same block, a three-level classification method of fracture development was established on the basis of fracture porosity distribution and its cumulative features. According to the actual production data, based on the effectiveness analysis of the matrix pores and fast inversion of fracture parameters from dual laterolog data, we divided the effective reservoirs into three classes Class I with developed fractures and pores, and high-intermediate productivity; Class II with moderately developed fractures and pores or of fractured type, and intermediate-low productivity; Class III with poorly developed fractures and matrix pores, and extremely low productivity. Accordingly log classification standards were set up. Production data shows that the classification of effective reservoirs is highly consistent with the reservoir productivity level, providing a new approach for the effectiveness evaluation of tight reservoirs. | Deng Shaogui Wang Yang Hu Yunyun Ge Xinmin He Xuquan | 2013 | Petroleum Science2013，10，3： | 3 |
| 3 | The sensitivity of the array resistivity log to mud filtrate invasion and its primary five-parameter inversion for improved oil water recognition显示文摘In order to improve reservoir fluid recognition, the sensitivity of array resistivity response to the difference of the invasion properties in both oil-bearing layers and water layers is analyzed. Then the primary inversion is carried out based on the array resistivity log. The mud invasion process is numerically simulated based on the oil-water flow equation and water convection diffusion equation. The results show that the radial resistivity of a fresh mud-invaded oil-bearing layer presents complex distribution characteristics, such as nonlinear increase, increasing to decreasing and low resistivity annulus, and the resistive invasion profile of a water layer is monotonic. Under specific conditions, array resistivity log can reflect these changes and the array induction log is more sensitive. Nevertheless, due to the effect of factors like large invasion depth, reservoir physical and oil-bearing properties, the measured apparent resistivity may differ greatly from the actual mud filtrate invasion profile in an oil-bearing layer. We proposed a five-parameter formation model to simulate the complex resistivity distribution of fresh mud-invaded formation. Then, based on the principle of non-linear least squares, the measured array resistivity log is used for inversion with the Marquardt method. It is demonstrated that the inverted resistivity is typically non-monotonic in oil-bearing layers and is monotonic in water layers. Processing of some field data shows that this is helpful in achieving efficient reservoir fluid recognition. | Deng Shaogui Sun Qingtao Li Hu Huo Ningning He Xuquan | 2012 | Petroleum Science2012，9，3： | 2 |
| 4 | Adsorption and heterogeneous Fenton degradation of 17α-methyltestosterone on nano Fe 3 O 4 /MWCNTs in aqueous solution显示文摘 | Xiaobin Hu Benzhi Liu Yuehua Deng Hongzhe Chen Si Luo Cheng Sun Po Yang Shaogui Yang | 2011 | Applied Catalysis B, Environmental2011，，3： | 1 |
| 5 | Highly efficient removal of tannic acid from aqueous solution by chitosan-coated attapulgite显示文摘 | Yuehua Deng Lin Wang Xiaobin Hu Benzhi Liu Zhongbo Wei Shaogui Yang Cheng Sun | 2011 | Chemical Engineering Journal2011，，： | 1 |
| 6 | Theoretical and experimental studies of membrane potential in shaly sands for improved Rw calculation 显示文摘 | Fan Yiren Deng Shaogui | 2002 | SPWLA2002，43，： | 1 |
| 7 | Saturation Estimation with Complex Electrical Conductivity for Hydrate-Bearing Clayey Sediments:An Experimental Study显示文摘Clays have considerable influence on the electrical properties of hydrate-bearing sediments.It is desirable to understand the electrical properties of hydrate-bearing clayey sediments and to build hydrate saturation(S_(h))models for reservoir evaluation and monitoring.The electrical properties of tetrahydrofuran-hydrate-bearing sediments with montmorillonite are characterized by complex conductivity at frequencies from 0.01 Hz to 1 kHz.The effects of clay and Sh on the complex conductivity were analyzed.A decrease and increase in electrical conductance result from the clay-swelling-induced blockage and ion migration in the electrical double layer(EDL),respectively.The quadrature conductivity increases with the clay content up to 10%because of the increased surface site density of counterions in EDL.Both the in-phase conductivity and quadrature conductivity decrease consistently with increasing Sh from 0.50 to 0.90.Three sets of models for Sh evaluation were developed.The model based on the Simandoux equation outperforms Archie’s formula,with a root-mean-square error(E_(RMS))of 1.8%and 3.9%,respectively,highlighting the clay effects on the in-phase conductivity.The fre-quency effect correlations based on in-phase and quadrature conductivities exhibit inferior performance(E_(RMS)=11.6%and 13.2%,re-spectively)due to the challenge of choosing an appropriate pair of frequencies and intrinsic uncertainties from two measurements.The second-order Cole-Cole formula can be used to fit the complex-conductivity spectra.One pair of inverted Cole-Cole parameters,i.e.,characteristic time and chargeability,is employed to predict S_(h) with an E_(RMS) of 5.05%and 9.05%,respectively. | XING Lanchang ZHANG Shuli ZHANG Huanhuan WU Chenyutong WANG Bin LAO Liyun WEI Wei HAN Weifeng WEI Zhoutuo GE Xinmin DENG Shaogui | 2024 | Journal of Ocean University of China2024，23，1： | 0 |
| 8 | Logging while drilling electromagnetic wave responses in inclined bedding formation显示文摘For real-time inversion and fast reconstruction of formation true resistivity, the forward modeling of electromagnetic wave logging while drilling is usually based on the transversely isotropic formation model with vertical symmetry axis(VTI medium), but it only considers the horizontal and vertical resistivity. It has certain limitation during practical application. This paper presents a forward calculation method of electromagnetic wave logging while drilling in transversely isotropic(TTI) strata with inclined symmetry axis based on the Dyadic Green’s function. Anisotropic angle and azimuth are used to characterize TTI formation. The proposed algorithm is verified by numerical examples, the half-space electromagnetic wave reflection and transmission characteristics with different media are analyzed, and the necessity to use the new algorithm is pointed out. Numerical simulation also shows that there exist a critical borehole dip and critical anisotropic angle in TTI formation. Electromagnetic wave logging while drilling responses follows opposite rule before and after these two critical angles. Besides, the 'horns' at the interface are not only related to well deviation, resistivity contrast, but also related to anisotropic angle and anisotropic azimuth. | FAN Yiren HU Xufei DENG Shaogui YUAN Xiyong LI Haitao | 2019 | Petroleum Exploration and Development2019，46，4： | 0 |
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