Lost Circulation Material Implementation Strategies on Fluid Loss Remediation and Formation Damage Control

2020 ◽  
Author(s):  
Mingzheng Yang ◽  
Yuanhang Chen
Keyword(s):  
Damage Control ◽  
Implementation Strategies ◽  
Formation Damage ◽  
Fluid Loss ◽  
Lost Circulation ◽  
Formation Damage Control

The "U-Type" Wells History of Fuzzy Ball Drilling Fluids for CBM Drilling in China

2013 ◽  
Vol 748 ◽  
pp. 1273-1276 ◽  
Author(s):  
Ben Guang Guo ◽  
Li Hui Zheng ◽  
Shang Zhi Meng ◽  
Zhi Heng Zhang
Keyword(s):  
Drilling Fluid ◽  
Damage Control ◽  
Ordos Basin ◽  
Coal Bed ◽  
Formation Damage ◽  
Drilling Fluids ◽  
Horizontal Section ◽  
Lost Circulation ◽  
Well Bore Stability ◽  
Formation Damage Control

The fuzzy ball drilling fluids have been developed on the basis of the circulation foam and Aphron to control lost circulation effectively. There are some difficulties in drilling U-type well, such as well-bore stability, cutting carrying problem, large torque and friction at the horizontal section, and formation damage to coal-bed. The objective of this paper was to show some applications of fuzzy ball drilling fluids on U-type wells of the Ordos Basin and prove the superiority of fuzzy ball drilling fluid in CBM drilling. To the three mentioned cases, the density of fuzzy ball drilling fluid was 0.90~1.18g/cm3, the funnel viscosity was 45~72s, the dynamic shear force was 12~19 Pa, the PV was 13~19mPa·s and the pH was ranged from 7 to 9. To use the fuzzy ball drilling fluids, the average ROP increased above 10% with no borehole complexity, such as stuck pipe, hole enlargement causing poor cleaning and etc. These cases reflected excellent properties of the fuzzy ball drilling fluids including effectively sealing, good carrying and suspension ability, formation damage control and compatible weighted by inert materials. Furthermore, the fuzzy ball drilling fluids will not affect BHA tools like motors and MWD in CBM drilling.

Multiscale Formation Damage Mechanisms and Control Technology for Deep Tight Clastic Gas Reservoirs

SPE Journal ◽  
2021 ◽  
pp. 1-16
Author(s):  
Yijun Wang ◽  
Yili Kang ◽  
Lijun You ◽  
Chengyuan Xu ◽  
Xiaopeng Yan ◽  
...  
Keyword(s):  
Drilling Fluid ◽  
Damage Control ◽  
Production Capacity ◽  
Damage Mechanism ◽  
Field Application ◽  
Formation Damage ◽  
Fluid Loss ◽  
Drilling Process ◽  
Gas Reservoirs ◽  
Filtration Loss

Summary Severe formation damage often occurs during the drilling process, which significantly impedes the timely discovery, accurate evaluation, and efficient development of deep tight clastic gas reservoirs. The addition of formation protection additives into drilling fluid after diagnosing the damage mechanism is the most popular technique for formation damage control (FDC). However, the implementation of traditional FDC measures does not consider the multiscale damage characteristics of the reservoir. The present study aims at filling this gap by providing a complete and systematic damage control methodology based on multiscale FDC theory. First, the characteristics of multiscale seepage channels were described through petrology, petrophysics, and well-history data. Subsequently, based on laboratory formation damage evaluation experiments, the formation damage mechanism of each seepage scale was determined. Finally, based on the multiscale formation damage mechanism, a systematic multiscale FDC technology was proposed. Through the use of optimized drilling fluid based on multiscale FDC theory, high-permeability recovery ratio (PRR), high-pressure bearing capacity of plugging zone, and low cumulative filtration loss were observed by laboratory validation experiments. Shorter drilling cycle, less drill-in-fluid loss, lower skin factor, and higher production rates were obtained by using the optimized FDC drilling fluid in field application. This multiscale FDC theory shows excellent results in minimizing formation damage, maintaining original production capacity, and effectively developing gas reservoirs with multiscale pore structure characteristics.

Study of Filtrate and Mud Cake Characterization in HPHT: Implications for Formation Damage Control

2015 ◽  
Author(s):  
Saeed Salehi ◽  
Ali Ghalambor ◽  
Fatemeh K. Saleh ◽  
Hadi Jabbari ◽  
Stefanie Hussmann
Keyword(s):  
Damage Control ◽  
Formation Damage ◽  
Mud Cake ◽  
Formation Damage Control
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