Abstract: This paper discusses the instruments and procedures available presently for evaluating fltration property, sizes of pore throats, thickness and compressibility of mud cake. Analyzed in this paper are the status quo of using SEM and energy spectrum in studying the microstructure of mud cake and the d...
Abstract: Perforation well completion is a widely used completion method, and is of great importance to oil and gas well stimulation. With more and more wells completed with perforation, more attentions have been paid to the sealing integrity of cement sheaths after perforation, especially the perforation of ...
Abstract: A high temperature borehole wall stabilizing agent SMNA-1 was developed to resolve problems encountered in high temperature deep well drilling. SMNA-1 functions at high temperature to above 200℃. It has a rigid molecular structure and is deformable at high temperature. SMNA-1 is able to enhance the ...
Abstract: The YS108 shale gas block is located in Huangjinba, Zhaotong, Yunnan Province, and the pay zone of this block is the Longmaxi formation of the lower Silurian series. The lithology of the pay zone is mainly gray, black shales which are easy to slough and collapse. In horizontal drilling, high frictio...
Abstract: Dendrimers, because of their unique molecular structures and characteristics, have been receiving more and more attention in recent years. Polyamide-amine (PAMAM), the most understood dendrimer, has been widely used in many felds, including oilfeld chemistry. In a recent study, the inhibitive capaci...
Abstract: The lithology of the Paleogene system in the Huabei oilfeld is mainly sandstone and mudstone, intercalated occasionally with basalt and coal bed. Different formation pressure systems have been found in this oilfeld. Time required for coping with troubles during drilling accounted for 73.62% of the t...
Abstract: Loss of oil base mud downhole is diffcult to stop in feld operation and causes great economic loss. An oil base mud loss control method is presented to effciently control oil base mud loss. This method uses gel lost circulation material (LCM) to control oil base mud loss. In selecting additives for ...
Abstract: Four blocks in the Qaidam Basin, Niudong, Lenghu, Zahaquan and Yingxi, have formation rocks with complex lithology, such as salt, gypsum, mirabilite, and hard and brittle shales etc. Downhole troubles have been frequently encountered in previous drilling operations. The Niudong nasal structure in th...
Abstract: Standard method for evaluating the corrosion rate of formatesis not presently available. A method of evaluating the corrosion rate of formates to casing/tubing strings has been presented with an idea borrowed from the methods of evaluating the corrosion rate of metals. In laboratory experiment, meta...
Abstract: Many technologies handling CO2 contamination to drilling fluids have shortages in practical use. This paper summarizes the defciencies of the methods commonly used, and presents advices for the treatment of CO2 contamination based on the mechanisms of contamination:drilling fluid should have moderat...
Abstract: The Bailu Lake multi-well pad is located in a scenic area where environmental protection requirements are tough and solidifcation of waste drilling fluid for burial is prohibited. Multi-well pad technology was adopted in the drilling of 43 wells in this area to conform to the environmental protectio...
Abstract: Floating beads and hollow glass beads are commonly used lightweight additives in cement slurries. These lightweight additives are expensive, and generally large amount of them are needed in formulating cement slurries of required density. Cement slurries treated with floating beads and hollow glass ...
Abstract: Mature thixotropic cement slurries are seldom seen in China presently. Slurries commonly used in oilfelds are of weak thixotropy, temperature sensitive, and have poor overall properties. To solve these problems, a thixotropic agent, N-1, has recently been developed by combining a synthesized amphote...
Abstract: The use of thixotropic cement slurry is an effective means of anti-channeling and controlling lost circulation in feld operations. In pumping thixotropic cement slurry, if pump halts, the pressure of re-starting the pump will increase with time. Too big an initiation pressure may result in lost circ...
Abstract: The clastic formations in the Block Tazhong have complex structures, poor lithological characters and toughness, and high brittleness. During drilling operation, wells penetrating the clastic formation have experienced borehole collapse and sloughing, and borehole of irregular sizes was formed. Ceme...
Abstract: The well Hongbei-1 is a well with the frst class well control risk drilled in the Qinghai oilfeld. It is also a well with the highest formation pressure drilled in that oilfeld. A high density (2.4 g/cm3) anti-channeling cement slurry was developed to cope with the cement slurry channeling. Hematite...
Abstract: To improve the viscoelasticity of carboxymethyl hydroxyethyl cellulose (CMHEC) solution to widen its feld of application, a water soluble EPIC-CMHEC has been developed by reacting epoxychloropropane (EPIC) with CMHEC. EPIC-CMHEC and CMHEC water solutions were studied for their rheology (flow curve, ...
Abstract: Stimulated reservoir volume fracturing operation in Changqing oilfeld requires large amount of fracturing fluids. To save water, fracturing fluids are required to be recycled. However, the recycled hydroxypropyl fracturing fluid presently commonly used in Changqingdoes not have the ability to carry ...
Abstract: Supramolecular polymer chemistry is a new interdiscipline of supramolecular chemistry and polymer chemistry. Based on the research work previously done on supramolecular fracturing fluid, a high temperature shear-resistant supramolecular polymer viscosifer, SPM-2, has been synthesized with a zwitter...
Abstract: Carbonate rock reservoirs have plenty of micro fractures. Unidirectional fngering of acid solution in acidizing carbonate reservoirs always results in diffculties in communicating fractures and low effciency of acidizing fracturing job. To improve the job effciency, a new high performance diverting ...
Abstract: Carboxymethyl hydroxypropyl guar gum fracturing fluid, an oligomer fracturing fluid and hydroxypropyl guar gum fracturing fluid are used in fracturing the tight sandstone gas reservoirs in Jian'nan block. In recent laboratory experiments, the viscosity, surface tension and residue of the three fract...
Abstract: The flowback of fracturing fluid directly affects the production rate of a reservoir in the later stage of production. In laboratory studies, the basic physical properties of reservoir core and fracturing fluid were measured. Based on the measurement, factors affecting automatic imbibition and key f...
Governed by: China National Petroleum Corporation Ltd
Editor-in-Chief:Shi-chun Chen(Engineer Technology Research Institute,BHDC)
Deputy Editor-in-chief:
Gui-juan Wang(Engineer Technology Research Institute,BHDC)Qiang Ren(Engineer Technology Research Institute,BHDC)
Address: Editorial Office of Drilling Fluid and Completion Fluid, Bohai Drilling Engineering Institute, Yanshan South Road, Renqiu City, Hebei Province