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Gypsum

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Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, November 15–18, 2021
Paper Number: SPE-208099-MS
... Based on the well logging data, geological data and drilling data and analyzing by in-situ stress modeling software, the in-situ stress gradient of salt rock is calculated as follows: the pressure gradient of the overlying layer of gypsum salt layer in Company A block B is about 2.30, the maximum...
Proceedings Papers

Paper presented at the ARMA/DGS/SEG 2nd International Geomechanics Symposium, November 1–4, 2021
Paper Number: ARMA-IGS-21-010
... ABSTRACT: The creep of multiple thick salt-gypsum formations was severe in the Xinghuo area of the Tarim Basin, and it was difficult to control directional trajectory and drilling fluid density. In this paper, the three-dimensional creep model of composite salt paste layers was established...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3584082
... to the influence of igneous salt rocks, gypsum salt rock, conglomerates and other special lithology, exploration is difficult. The gypsum salt rock is very developed in the marine strata in China, such as the Middle Cambrian in the Tarim Basin, the Ordovician Majia Gou Formation in the Ordos Basin and Triassic...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1739
... ABSTRACT: Hydraulic fracturing is used to create new fractures and propagate existent ones, thus enhancing the permeability of a rock reservoir. Four experiments were conducted at constant injection rates in molded gypsum (high porosity, low-stiffness): two at 20ml/min and two at 2 ml/min...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1418
... ABSTRACT: With the deepening of geological exploration and development, drilling for oil and gas resources in the deep subsalt formations have become a main direction. The mineralogical characteristics of the salt-gypsum layer is the main internal factor affecting its geomechanical properties...
Proceedings Papers

Paper presented at the CORROSION 2021, April 19–30, 2021
Paper Number: NACE-2021-16707
... Abstract In the present work a variety of polymers with different functional groups and molecular weight (MW) were tested as gypsum scale inhibitors. The polymers tested include: poly(acrylic acid) PAA; poly(maleic acid), PMA; poly(aspartic acid), PASP; poly(epoxysuccinic acid), PESA...
Proceedings Papers

Paper presented at the 54th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2020
Paper Number: ARMA-2020-1681
... and shear cracks. However, most numerical investigation has focused on simulations of a single crack. In this study, numerical simulations of gypsum specimens containing double flaws under uniaxial compression were conducted using the code FROCK which is based on the displacement discontinuity method (DDM...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2020, June 14–19, 2020
Paper Number: ISRM-EUROCK-2020-125
... controlling the deformation and failure of gypsum C. Caselle, S. Bonetto, F. Vagnon & A.M. Ferrero Department of Earth Science, Torino University, Torino, Italy chiara.caselle@unito.it (email of corresponding author) D. Costanzo Department of Structural, Geotechnical and Building Engineering, Torino...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3215618
... ABSTRACT For the prestack depth migration, an accurate velocity model is a key factor to achieve good imaging result. In some piedmont thrust zones, the highly plastic gypsum layer may produce severe deformation during the extrusion structure movement, which brings great difficulties...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1957
... formation is crucial in civil, environmental and energy engineering research and practice. A series of gypsum core flood tests were conducted to study the effect of flow rate on the dissolution of the gypsum rock matrix and the formation of wormholes. High-resolution X-Ray computed tomography (CT) was used...
Proceedings Papers

Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-12921
... ABSTRACT The precipitation of calcium sulphate dihydrate (CaSO 4 •2H 2 O, gypsum) was studied at 25 °C at constant calcium ion activity. The stability domain of the system and the kinetics of spontaneous precipitation of gypsum from unstable supersaturated solutions was investigated...
Proceedings Papers

Paper presented at the International Petroleum Technology Conference, March 26–28, 2019
Paper Number: IPTC-19224-MS
... . Hargis , C.W. , Kirchheim , A.P. , Monteiro , P.J.M. and Gartner , E.M. 2013 . Early age hydration calcium sulfoaluminate (synthetic ye'elimite, C4A3S) in the presence of gypsum and varying amounts of calcium hydroxide . Cement and Concrete Research 48 : 105 – 115...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2987066
...Comprehensive study on formation imaging underlying the gypsum rock-a case study from eastern Sichuan Basin, China Qiang Zhang*, Shujiang Wang and Tao Chen, PetroChina Research Institute of Petroleum Exploration & Development PetroChina Southwest Oil & Gas Field Company Research Center of Sichuan...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-090
... and the other from lateral. Ultrasonic pulse-transmission equipment was used to measure the P- and S- wave velocity at four different directions for each sample. Integrating these multiple methods from nano to macro scale, anisotropy of 3D printed gypsum rocks could be analyzed and discussed in detail...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2018, May 22–26, 2018
Paper Number: ISRM-EUROCK-2018-200
... to is porosity. With a 3-D printer with the resolution of 0.2 mm, this study manufactured a standard cylinder sample of 3-D printed gypsum rock and firstly measured the porosity of 3-D printed gypsum rock sample by the laboratory methods—Helium Porosimeter (HP) and Mercury Injection Porosimetry (MIP), whose...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2018, May 22–26, 2018
Paper Number: ISRM-EUROCK-2018-160
... Gypsum is an important raw material, widely used for constructions and other industrial sectors. Despite it is largely exploited around the world, due to its high heterogeneity, there are still some open issues concerning its mechanical behaviour. In scientific literature, many studies...
Proceedings Papers

Paper presented at the SPE Russian Petroleum Technology Conference, October 16–18, 2017
Paper Number: SPE-187713-MS
... be performed in the salt layer, which puts forward a new challenge to the safety of drilling. There are two key factors to solve the safety drilling problem of salt-gypsum layer: one is the compatibility of drilling fluid and the optimization of drilling fluid density. The second is the precise selection...
Proceedings Papers

Paper presented at the ISRM Progressive Rock Failure Conference, June 5–9, 2017
Paper Number: ISRM-PRF-2017-049
... 1 Introduction In order to consider the presence of cracks in an abandoned gypsum pillar in numerical simulations, a hybrid method FEM/DEM, which allows the transition from continuum to discontinuum, was assumed. By means of a specific numerical code (ELFEN), this approach has been calibrated...
Proceedings Papers

Paper presented at the ISRM Progressive Rock Failure Conference, June 5–9, 2017
Paper Number: ISRM-PRF-2017-024
... 1 Scope Experience from two case histories of tunnels where swelling involving sulfates and gypsum will be presented. Unexpected swelling phenomena were observed of the invert in both tunnels. One tunnel is located at the northern edge of the Triassic Keuper formation in Luxembourg: Tunnel...
Proceedings Papers

Paper presented at the CORROSION 2017, March 26–30, 2017
Paper Number: NACE-2017-9020
... ABSTRACT The kinetics of calcium sulfate dihydrate (CaSO 4 .2H 2 O, gypsum) scale formation on heated metal surface from aqueous solution has been studied by a highly reproducible technique. It has been observed that gypsum growth takes place directly on heated metal surface without any bulk...

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