Combined with the current research status in this area at home and abroad, with the improvement of salt and high temperature resistance as the research goal, the laboratory research of salt and high temperature resistant drilling fluid system has been carried out, and lubricants, inhibitors and stabilizers have been optimized. The final drilling fluid formula is: water + 3% sepiolite + 0.3% Na2CO3 + 3% RH-225 + 3% KCOOH + 3% G-SPH + 3% CQA-10 + 1.5% ZX-1 + Xinjiang barite, density 2.2 g/cm3, using hot-rolling furnace, environmental scanning electron microscope, high temperature and high pressure plugging instrument and Zeiss microscopes and other instruments use core immersion experiments, permeability recovery value experiments, and static stratification index methods to perform temperature resistance, reservoir protection, plugging performance, and static settlement stability performance of the configured drilling fluid., Inhibition performance, biological toxicity, salt resistance, anti-pollution performance have been tested, and it is concluded that the temperature resistance is good under the condition of 210°C, and the salt resistance can meet the requirements of 20% NaCl + 0.5% CaCl2 concentration. It has a good reservoir protection effect, the permeability recovery value can reach more than 90%, the performance of restraining water dispersion and cuttings expansion is good, the heat roll recovery rate can reach more than 85%, and the SSSI value shows that its settlement stability performance is good; Its plugging performance is good under high temperature and high pressure. It laid the foundation for the next step to promote the field application of the drilling fluid system.
References
[1]
Wang, S., Song, M. and Liu, E. (2009) Development of Deepwater Drilling Fluid Technology Abroad. Petroleum Drilling Technology, 37, 8-12.
[2]
Wang, S., Zeng, K., Yuan, J., et al. (2006) Research and Application of Salt and High Temperature Resistant Water-Based Drilling Fluid System. Journal of Oil and Gas Technology, 28, 105-108.
[3]
Yuan, J., Wang, S., Hu, S., et al. (2010) Laboratory Research on Deepwater Water-Based Drilling Fluids. Drilling Fluids and Completion Fluids, 27, 14-16.
[4]
Guo, X. (2019) Synthesis and Evaluation of Temperature and Salt Resistant Emulsion Polymer Fluid Loss Reduction Agent HT-PL. Petrochemical Technology, 26, 10-11, 27.
[5]
Tian, M. (2020) Development and Application of Temperature and Salt Resistant Polymer Fluid Loss Reducer for Drilling Fluid. Chemical Management, No. 12, 200-201.
[6]
Guo, W., Dong, L. and Chen, Z. (2020) Preparation and Application of Temperature and Salt Resistant Compound Starch Fluid Loss Reducer for Drilling Fluid. Journal of Mianyang Normal University, 39, 56-60.
[7]
Quan, H., Mo, L. and Zhang, T. (2013) Study on a Water Shutoff Agent with Temperature and Salt Tolerance. Applied Chemistry, 42, 1100-1104.
[8]
Li, Z., Yang, X., Wang, Z., Chen, Q., Yu, F. and Wang, C. (2014) Synthesis and Evaluation of a Temperature and Salt Resistant Crosslinked Polymer Water Shutoff Agent. Applied Chemistry, 43, 1288-1293.
[9]
Liu, Y. (2017) Study on a Novel Temperature and Salt Resistant Selective Water Shutoff Agent. Southwest Petroleum University, Chengdu.
[10]
Yan, L. (2013) Development and Application of Temperature-Resistant and Saturated Salt Polymer Drilling Fluid Loss-Reducing and Viscosity-Reducing Agent. China University of Geosciences, Beijing.
[11]
Pu, L. (2014) Application Research on High-Temperature Resistant and High-Density Water-Based Drilling Fluid System. Southwest Petroleum University, Chengdu.
[12]
Lu, H., Zhang, B. and Lan, X. (2006) Discussion on Evaluation Method of Anti-collapse Performance of Asphalt Treating Agent for Drilling Fluid. Drilling & Production Technology, No. 1, 96-98, 128.
[13]
Wu, X., Lin, Y., Song, B., Jin, J. and Dong, X. (2021) Shunbei Ordovician Fractured Formation Oil-Based Drilling Fluid Technology. Drilling and Completion Fluids: 1-10.
[14]
Cai, B., Zhang, H., Wang, J., Xiang, X., Shi, M., Shu, F. and Wu, B. (2019) Construction and Application of High Temperature Resistant Low Free Water Drilling Fluid System in the East China Sea. China Offshore Oil & Gas, 31, 147-153.
[15]
Wan, L., Ji, X., Liu, Z., et al. (2020) Development and Performance Evaluation of Anti-High Temperature Foaming System. Drilling Fluids and Completion Fluids, 37, 71-76.
[16]
Ye, C., Rong, K., Xiang, D., et al. (2017) Development and Performance Evaluation of Shale Amine Inhibitor PEDAS. Fault Block Oil and Gas Field, 24, 269-272, 288.
[17]
SY5336-88, Recommended Method for Conventional Core Analysis.
[18]
SY/T5358-94, Recommended Experimental Method for Sandstone Reservoir Sensitivity Evaluation Experiment.
[19]
Zeng, W. and Bouguetta, M.A. (2016) Comparative Assessment of Barite SAG Evaluation Methods. SPE Deepwater Drilling and Completions Conference, Galveston, September 2016, Paper No. SPE-180348-MS. https://doi.org/10.2118/180348-MS
[20]
Ye, Y., Yin, D., Liu, C., et al. (2005) A Device and Method for Testing the Sedimentation Stability of High-Density Oil Testing Working Fluid. CN102818881B.
[21]
Parvizinia, A., Ahmed, R.M. and Osisanya, S.O. (2011) Experimental Study on the Phenomenon of Barite Sag. International Petroleum Technology Conference. International Petroleum Technology Conference, Bangkok, November 2011, Paper No. IPTC-14944-MS. https://doi.org/10.2523/IPTC-14944-MS
[22]
Jones, F.V. and Leuterman, A.J.J. (1990) Alternate Environmental Testing of Drilling Fluids: An International Perspective. European Petroleum Conference, The Hague, October 1990, Paper No. SPE-20889-MS. https://doi.org/10.2118/20889-MS
[23]
Yi, S. and Yu, Y. (2002) Petroleum and Environmental Microbiology Technology. China University of Geosciences Press, Beijing.
