scholarly journals Preparation and Evaluation of a Profile Control Agent Base on Waste Drilling Fluid

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Xiaoping Qin ◽  
Haiwei Lu ◽  
Yilin Li ◽  
Tong Peng ◽  
Lijie Xing ◽  
...  
Keyword(s):  
Raw Materials ◽  
Drilling Fluid ◽  
Water Injection ◽  
Salt Resistance ◽  
Control Agent ◽  
Injection Wells ◽  
Mild Conditions ◽  
Performance Indexes ◽  
Profile Control ◽  
Preparation And Evaluation

The waste drilling fluid was treated by a flocculant and a pH regulator. And a novel profile control agent base on waste drilling fluid (PCAWDF) was prepared using polymer, formaldehyde, resorcinol, and thiourea as raw materials under mild conditions. PCAWDF was characterized by infrared (IR) spectroscopy and scanning electron microscope (SEM). Compared with the profile control agent prepared by the recirculated water (PCARW), PCAWDF exhibited comparable or better stability, salt resistance, and viscoelasticity. The results of parallel core plugging experiments showed that the profile improvement capability of PCAWDF was stronger than that of PCARW (for 3000 mg/L: 84.6% versus 83.1%; for 5000 mg/L: 91.8% versus 90.2%). The main performance indexes of PCAWDF could meet the need of profile control for the water injection wells. The method could solve the problem of waste drilling fluid treatment in an economic and environmental way.

Research on Degradation of Flocculating Stemming Contained Polymer and Clay Used for Profile Control

2014 ◽  
Vol 912-914 ◽  
pp. 297-300
Author(s):  
Wei Zhang ◽  
Shuang Yan Zhang ◽  
Deng Feng Ju ◽  
Hai Jun Yan ◽  
Guo Qing Fu ◽  
...  
Keyword(s):  
Yellow River ◽  
Sol Gel ◽  
Water Injection ◽  
Injection Pressure ◽  
Control Agent ◽  
Oil Wells ◽  
Control Technique ◽  
Injection Wells ◽  
Fracture Pressure ◽  
Profile Control

Since Menggulin reservoir fully been developed in1990, profile control technique is widely used for improving water swept volume. After multiple rounds and large-scales of polymer flooding by materials mixed with sol-gel and Yellow River clay, the formation damage such as depth blockage and stemming become more and more serious.According to statistics, in 2012 there are respectively 10 and 11 water injection wells happened with back flow of profile control agent and wells pressure higher than fracture pressure that without injection. The original reservoir permeability is good, and individual well production has the capacity of 40 to 50m3/d. Yet recently several oil wells almost have fewer even no liquid output due to the blockage and stemming. Estimated by a typical well group,the speed of sol-gel drive increased from 10 m/year to 50~60 m/year, and average water injection pressure were up to 16MPa which almost double original pressure while the only 2MPa pressure corresponding to oil wells. Hence, it show that the severe depth blockage of the formation exactly exit in Menggulin reservoir.

A Streamline-Based Model of Wuliwan Oil Field Injecting Polymer Microspheres to Enhance Sweep Efficiency of Water Flooding

2011 ◽  
Vol 361-363 ◽  
pp. 451-455
Author(s):  
Zhao Qi Fan ◽  
Lin Song Cheng ◽  
Fu Dai ◽  
Jian Shen
Keyword(s):  
Water Injection ◽  
Field Tests ◽  
Control Agent ◽  
Oil Field ◽  
Water Flooding ◽  
Polymer Microspheres ◽  
Sweep Efficiency ◽  
Polymer Microsphere ◽  
Injection Wells ◽  
Profile Control

Polymer microsphere is a deep profile control agent which has been developed in recent years. Microsphere’s excellently elastic property makes it possible to be injected, or to penetrate deep into formation, and plug high permeable layers. Many laboratory investigations have been carried out on polymer microspheres by researchers, and field tests also have been done in some oilfields. The laboratory and field test results show that polymer microspheres can plug pore throats effectively, decrease permeability of high permeable channels, thus force injected water to change it’s direction and enhance water-flood sweep efficiency. In this paper, based on the mechanisms of profile modifying and plugging of polymer microsphere, Streamline models have been build abstractly to simulate the profile controlling progress of polymer microspheres, observe the transformation of streamline field, and analyze its impact on the pressure of water injection wells and performance of oil wells. In the end, the mechanisms of profile modifying and plugging of polymer microspheres have been interpreted based on the streamline field.

Improvement Research of Organic Phenolic Gel being Used to be an Organic Deep Profile Control Agent

2014 ◽  
Vol 908 ◽  
pp. 46-50
Author(s):  
Yu Li Liu ◽  
Yi Qin
Keyword(s):  
Crosslinking Agent ◽  
Gelation Time ◽  
High Water ◽  
Salt Resistance ◽  
Control Agent ◽  
Water Soluble ◽  
Water Control ◽  
Profile Control ◽  
Weak Gel ◽  
Deep Profile

Organic phenolic gel is commonly used to be a deep profile control agent which applies to use in the high water cut oilfields where heterogeneity is severe, improve the contradiction of inter-reservoir layer and inner layer, expand water sweeping zone, and achieve the purpose of stable oil production and water control. Organic phenolic weak gel is mainly affected by the concentration of each component and reaction temperature. In this paper, formaldehyde was replaced by urotropin, which is not only delaying the gelation time, but also avoiding pollution. In addition, a water-soluble phenolic resin oligomer has been synthesized by the method of two-step alkali catalysis with appropriate mole ratio as an auxiliary crosslinking agent. Considering the concentration of each reactant as the factor, the orthogonal experiments have been designed to optimize the traditional organic HPAM-phenolic weak gel. We have found that the optimized weak gel has a better stability, longer gelation time, better salt resistance and environment friendly. It can better meet the needs of oilfield deep profile control.

Preparation and Application of J-F Profile Control Agent

2014 ◽  
Vol 962-965 ◽  
pp. 727-730
Author(s):  
Zhan Shuang Xu
Keyword(s):  
Ph Value ◽  
Injection Pressure ◽  
Binary Compound ◽  
Salt Resistance ◽  
Temperature Tolerance ◽  
Economic Benefits ◽  
Control Agent ◽  
Utilization Rate ◽  
Profile Control ◽  
Liaohe Oilfield

In Liaohe oilfield Xing 28 block before and during the alkali/polymer binary compound flooding process, there are heterogeneity contradictions on vertical and plane formation. In order to solve this contradiction, improve the utilization rate of oil displacement agent, J - F profile control agent was developed successfully, the profile control agent is not restricted by formation pH value and gel time, of good resistance to flushing, temperature tolerance and salt resistance. Through the field test, using J-F profile control agent the injection profile changed significantly and the injection pressure increased, a remarkable economic benefits and social benefits are gained.

The Water Absorption Rule of Vertical Fractured Well

2014 ◽  
Vol 624 ◽  
pp. 573-576
Author(s):  
Zhong Guo Wang ◽  
Guang Yu Zhang ◽  
De Kai Zhou ◽  
Yi Qing Li ◽  
Wen Ping Song
Keyword(s):  
Raw Materials ◽  
Water Injection ◽  
Uniform Flow ◽  
Injection Wells ◽  
Vertical Fracture ◽  
Flow Formation ◽  
Key Factor ◽  
Fractured Well ◽  
Bottomhole Pressure ◽  
Vertical Fractures

Oil is an important energy and chemical raw materials and strategic materials. Nowadays, the layered water injection test technology become the key factor of oilfield production. According to different types of formation and for the artificial fracturing injection wells, this paper studied the infinite boundary, uniform flow and vertical cracks well, infinite diversion vertical fractures and conductivity vertical fracture wells’ absorbent law. The method to do all of the above work is to solve the equation of dimensionless bottomhole pressure in different formation and boundary conditions. The indicating curve of infinite uniform flow formation, unlimited conduction and limited conduction vertical fractures wells are almost identical, which means that the type of vertical fracture has little effect on the indicate curves of injection wells.

scholarly journals A Novel Micro-Nano Structure Profile Control Agent: Graphene Oxide Dispersion

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Zhong-Bin Ye ◽  
Yuan Xu ◽  
Hong Chen ◽  
Chen Cheng ◽  
Li-Juan Han ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Water Injection ◽  
Control Agent ◽  
Water Flooding ◽  
Sem Images ◽  
Nano Structure ◽  
Apparent Thickness ◽  
Profile Control ◽  
Potential Applications ◽  
Oilfield Water

Graphite oxide sheet, now referred to as graphene oxide (GO), is the product of chemical exfoliation of graphite and has been known for more than a century. A GO sheet is characterized by two abruptly different length scales; the apparent thickness of the functionalized carbon sheet is approximately 1 nm, but the lateral dimensions can range from a few nanometers to micrometers. In this paper, an improved method for the preparation of graphene oxide within a mild condition is described. We have found that cancelling the high-temperature stage and prolonging the reaction time of mid-temperature can improve the efficiency of oxidation process. We utilized FTIR, XRD, Ultraviolet-visible, TGA, Raman spectrum, and XPS measurements to characterize the successfully synthesized GO. SEM images were employed to reveal the interior microstructure of as-prepared GO dispersion. We also wondrously found that the GO dispersion could be used as profile control agent in the oilfield water-flooding. Flooding experiments showed that the GO dispersion has an ability to adjust water injection profile, reduce permeability ratio, and improve conformance factor. So the GO dispersion would have potential applications in oilfield exploitation.

Novel Profile Control Treatment Using Pore-Scale Polymer Elastic Microspheres

2013 ◽  
Vol 716 ◽  
pp. 413-417 ◽  
Author(s):  
Lei Li ◽  
Xue Mei Gao ◽  
Guang Lun Lei ◽  
Xiao Dong Wei
Keyword(s):  
Aqueous Solution ◽  
Oil Recovery ◽  
Water Injection ◽  
Control Agent ◽  
Control Treatment ◽  
Pore Scale ◽  
Swelling Property ◽  
Profile Control ◽  
Heterogeneous Formation ◽  
Deep Profile

In order to solve the deep profile control problem and improve oil recovery of the oilfield, a novel profile control agent pore-scale polymer elastic microspheres (PSPEMs) was synthesized. The swelling property of PSPEMs in aqueous solution was analyzed. Core flow test and double-tube sand pack models were used for studying profile control and flooding performance of PSPEMs in oil formation. The results show that PSPEMs have good swelling property in aqueous solution with high salinity, high temperature and high pressure. Fig 5 and Fig 6 show that PSPEMs are better than polyacrylamide polymer on profile control. Table 1 indicates PSPEMs can improve water injection profile of heterogeneous formation effectively and plug the high permeable layer first. The higher the concentration of PSPEMs, the shorter the time it spends to realize profile control. The results also confirm that use proper concentration of PSPEMs, the profile control efficiency can increase enormously.

The Preparation and Characterization of AM/2-EHA/VTEOS Copolymer as Profile Control Agent

2012 ◽  
Vol 602-604 ◽  
pp. 732-738
Author(s):  
Ming Tian ◽  
Yong Jun Xu
Keyword(s):  
Oil Recovery ◽  
Thermo Gravimetric Analysis ◽  
Salt Resistance ◽  
Temperature Tolerance ◽  
Control Agent ◽  
Structure Characterization ◽  
Gravimetric Analysis ◽  
Free Radical Copolymerization ◽  
Good Thermal Stability ◽  
Profile Control

In order to enhance oil recovery and avoid the profile control agents degradation in the alkali/surfactant/polymer composite solution in the oil layer, the copolymer of AM (basic monomer), 2-EHA (salt resistance monomer with large lateral group) and VTEOS(temperature tolerance monomer) was prepared by free radical copolymerization method as the profile control agent. FT-IR and 1H-NMR were used for the structure characterization. Thermo gravimetric analysis, Core/Sand pack experiments and water drive displacement tests of copolymer particles were used to evaluate the properties. The results shows that the copolymer particles have good thermal stability, alkaline resistance, anti-salt property and excellent blocking property as profile control agent.

MFR High Temperature Profile Control Agent Experimental Evaluation

2012 ◽  
Vol 602-604 ◽  
pp. 1250-1254
Author(s):  
Zhen Zhong Fan ◽  
Li Feng Zhang ◽  
Qing Wang Liu
Keyword(s):  
High Temperature ◽  
Temperature Profile ◽  
Gelation Time ◽  
Salt Resistance ◽  
Control Agent ◽  
Heating Time ◽  
The Core ◽  
Profile Control ◽  
Stable Performance ◽  
Breakthrough Pressure

MFR high temperature profile control agent consisted of 6.5% wood Fortunately sulfonic acid calcium (Ca-LS) and 6.5% crosslinker modified furfural resin (MFR),and the gel solution formed a stable performance gel in the 150~300°C.The higher the temperature, the shorter the gelation time; and the longer the heating time, the higher the gel strength. The gel is very stable at 300°C, and is well in acid and salt resistance. The core experiments showed that the blocking agent's blockage ratio is more than 99% ; the units of the breakthrough pressure was greater than 100 kPa / cm,which the gel solution is a good performance of high-temperature profile control agent.

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