聚合物驱前区块整体调剖技术的矿场应用

河南油田聚驱现场应用结果表明,以单井凋剖为主的调剖技术不能解决聚合物窜流问题.为了抑制聚合物的窜流,改善聚驱效果,2004年以后,河南油田所有进行聚驱的6个区块都应用了聚驱前区块整体凋剖技术,127口注聚井中调剖89口井,调剖率70.1%,调剖半径50～65 m,达到大剂量深度区块整体调剖技术的要求.调剖后注入压力上升、视吸水指数下降、吸水剖面得到改善;在注入聚合物浓度(1 500 mg/L)高于其他未进行区块整体调剖聚驱区块(1 000 mg/L)的条件下,区块产出液聚合物浓度大幅度降低,第3年区块产出液聚合物浓度从355 mg/L下降到150 mg/L,有效期可以维持3年以上,这是单井调剖无法达到的效果.聚驱前进行深度区块整体调剖可以解决注聚合物过程中聚合物窜流的问题.     

滴12井区八道湾组油藏深部调驱技术早期应用效果

针对滴12井区八道湾组油藏非均质性严重、大孔道发育、含水上升速度较快、小剂量调剖效果较差等特点,提出深部调驱技术早期介入、区块整体进行深部调驱的治理思路。研发了适合该区块的以聚丙烯酰胺为主的深部调驱凝胶体系,该体系具有很好的成胶强度和封堵效果,现场试验为了提高对较大水窜通道的封堵能力,在调驱凝胶体系中加入了固相颗粒。2010年在滴12井区进行了4个井组的调驱措施,注水井平均注入压力上升1.85 MPa,措施井组日产油由2.0 t 上升到最高3.1 t,综合含水由57.8%下降到56.6%,4个井组目前累计增油1 063 t,效果较好。     

沈84-安12块高凝油油藏注水井大孔道深度调剖技术

沈阳采油厂沈84-安12块是全国最大的高凝油砂岩开发区块,油藏开发进入高含水期后,注水开发中稳定地层压力与控制油井含水上升速度的矛盾日益突出.针对区块油藏非均质性强、长井段、多层位生产、注水井单层突进现象严重的现状,研究了深度调剖技术,并取得了一定的效果.该项深度调剖技术是利用示踪技术的成果,结合剩余油主要分布在主力油层大孔道中的实际.在工艺上采用封堵、深度调剖、注驱替剂的阶梯式注入段塞深度调剖工艺.来扩大大孔道注水的波及面积,以提高区块的注水开发水平.     

可动凝胶深部调剖调驱技术研究与应用

目前全国大部分油田注水开发已进入中、高含水期,呈现出油井含水上升快,水驱动用程度低,产量递减幅度大等特点。针对在开发中存在的含水率高的矛盾,进行了可动凝胶深部调剖调驱配套技术的理论和配方研究,研制出了试验配方,并进行现场应用10井次,成功率100％,共注入调剖剂量2．1×10^4m^3,增油5371t,降水4830m^3,取得了良好的应用效果,有效地减缓了区块含水上升的速度和产量递减的速度。生产实践证明,调剖调驱技术是提高注水采收率的重要技术之一。     

孤岛油田中二南注聚初期调剖及效果分析

孤岛油田注聚区块油藏研究成果和矿场测井、取心资料表明,中二南Ｎｇ＾３－４油层中存在高渗透带或大孔道。为了进一步增加聚合物驱的波及体积,提高注聚合物区块整体开发效果。在中二南Ｎｇ＾３－４注聚区块的注聚初期,运用ＲＥ油藏工程决策系统对１０口 实施调剖工艺,调剖后平均注入压力上升５．３１ＭＰａ,和其它区块同期相比见聚井数下降２０．６％,取得了良好的应用效果。     

油井高产聚层化学封口工艺技术研究

随着聚驱采油的工业化推广应用，油田部分区块已进入了聚驱后期及后续水驱开采阶段。由于层内和层间渗透率的差异，部分油井厚油层内中、低渗透层的动用效果仍然很差，严重影响了聚驱开发效果。为此，提出利用复合高效封堵剂，封堵油井各高产聚、高产水层，改善产液剖面，从而提高中、低渗透层驱油能力的油井化学封口技术。概括了堵剂的室内实验评价结果，研究分析了化学封口工艺技术条件，认为应用这项技术可以使受物性夹层限制而无法机械封堵的厚油层层内产液剖面得到有效调整，对提高聚驱后期开发效果具有实际意义，同时对注聚井调剖与油井封堵相结合的整体区块挖潜具有指导作用，是油田高含水后期的挖潜方向。     

复合离子聚合物深度调剖试验效果

通过大庆油田萨北开发区注聚合物前进行的复合离子深度调剖试验,表现出了调剖井注入压力、PI值明显上升,高渗透层渗透率变差,注入剖面得到改善且稳定时间长;产出井产出剖面连续得到改善,产液指数下降幅度较,见效时间较聚驱提前等动态变化特征。分析了线状注水井组和特高含水井见效明显的原因。论证了该项技术在聚驱开采区块推广应用的必要性。     

聚合物驱全过程措施优化

工业化聚合物驱实践表明 ,由于油层非均质性和井网完善程度等多种因素影响 ,油田开发矛盾突出表现在层间干扰严重 ,差油层动用程度低 ,厚油层内部高渗透部位动用程度高 ,注聚后期井间含水率存在较大差异 ,平面矛盾突出。为充分利用储量资源 ,改善聚驱开发效果 ,对聚驱全过程进行措施优化。一是在空白水驱阶段进行调整 ,为注聚奠定基础 :①采取低强度注水和分层注水措施 ,控制油层压力水平 ,为聚合物顺利注入创造条件 ;②注聚前采用深度调剖技术 ,调整吸水剖面 ,提高存聚率 ;③根据空白水驱生产动态 ,优化注入参数 ,合理设计单井配产配注方案…     

聚合物驱前区块整体调剖在普通稠油油藏的应用

为了控制聚驱过程中聚合物窜流,河南古城油田泌123区块实施了聚驱前整体深部调剖.选择聚合物铬凝胶为调剖剂,分较低、较高浓度的两个段塞注入,两段塞体积比为0.75:0.25,成胶时间分别为24、10小时.该区块14口注聚井中,4口油井转注聚井除外,其余10口井同时进行聚驱前调制,调剖厚度2.0～6.5m,调剖半径35～50m,调剖剂单井注入量1718～6943m3,总注入量35526m3.调剖后10口井注入压力、启动压力上升,视吸水指数下降,平均改变量分别为+5.1MPa、+5.18MPa、-5.1m3/d·Mpa;两口井同位素测试数据表明调剖后吸水剖面大幅改善.古泌123区块注聚1、2、3年时产出液中聚合物浓度分别为63、128、157mg/L,与其他6个注聚区块相比,均大幅减少.     

萨北开发区北二东西块二类油层三元驱开发效果

北二东西块二类油层是大庆油田萨北开发区弱碱三元复合驱工业化推广区块,目前处于三元主段塞注入阶段,区块综合含水率呈持续下降趋势。应用油藏工程理论,结合区块开发地质特点,通过精细地质解剖、剩余油分布、生产动态分析及精细过程管理,开展了注剂前深度调剖、规模分注、体系优化及个性化跟踪调整等工作,对各类工作及区块整体开发效果进行了评价,并与同类区块进行对比。结果表明:区块综合含水率与注剂前相比下降6.8百分点,单井日增油3.9 t,增油达到1.29倍,明显高于其他同类区块。总结出区块分类井见效特征,明确了弱碱三元复合驱开发指标变化规律,深化了油藏开发规律认识,为其他三元驱区块开发调整提供了依据。     

阿姆河右岸酸性气田井口冲蚀及对策

中亚土库曼斯坦阿姆河右岸气田群为高含H_2S和CO_2的碳酸盐岩气藏,单井产量高,井口设备均出现了不同程度的腐蚀。初步分析认为其原因是生产过程中仅考虑酸性介质对气井井口的化学腐蚀,而没有考虑气体流速对井口的冲蚀作用,极大地影响了气田的安全生产。为此,通过对节流阀上下游阀道、法兰面均出现明显坑状腐蚀的进一步分析,明确了化学腐蚀和气体冲蚀的交互作用是井口磨损的主要影响因素,气流冲刷腐蚀坑的化学腐蚀产物会加速冲蚀损害;进而借鉴冲蚀与腐蚀运行环境下的多相管流管道的磨损计算理论,计算了该运行环境下的冲蚀极限速度,得到了不同生产工况下节流阀的抗冲蚀流量;最后,根据气田生产情况,针对性地提出了按气井配产要求来选择采气树类型、节流阀通径及类型冲蚀的技术控制策略。此举为气田安全生产提供了工程技术保障。     

山前地区深井超深井套管防磨与减磨技术研究

针对山前地区深井超深井钻井过程中套管磨损严重的问题,在分析套管磨损机理的基础上,开展了山前地区套管防磨与减磨技术研究,基于技术研究成果及应用实践,得到如下结论:1应用Power V等垂直钻井系统控制井眼轨迹,特别是上部井段的狗腿度和井斜,可明显减小侧向力和磨损量,缩短套管磨损时间;2应综合考虑套管磨损率、磨损系数以及钻杆耐磨带本身的磨损量,优选出效果最优的耐磨带;在狗腿度严重的位置,可考虑采用一定数量的橡胶钻杆卡箍来减轻对套管的磨损;3山前地区钻井液采用CX-300减磨剂能够显著降低磨损速率,减轻套管磨损程度,但在不同钻井液体系使用之前应进行优化分析以确定最佳使用量;4在迪那204井使用高密度钻井液体系,全部采用优选的高密度重晶石粉代替铁矿粉作为加重剂,整个钻进过程中未出现钻具及套管磨损,迪那204井易损件消耗量仅为邻井迪那203井的左右,防磨减磨效果非常显著。     

Biodiesel Projects Helpful to Ease Energy Shortage

Nearly 7,000 hectares of biodiesel forest will take shape in the northern province of Hebei in 2008, part of a national campaign to fuel the fast growing economy in a green way. In no more than five years, the Pistacia chinensis Bunge, whose seeds have an oil content of up to 40 percent, will yield five tons of fruit and contribute about two tons of high-quality biological diesel oil, according to the provincial forestry administration.     

State Energy Base Proposed in Inner Mongolia

Experts recently suggested China set up a state energy base in lnner Mongolia Autonomous Region to ease its energy thirst. The survey was co-conducted by senior researchers from the National Development and Reform Commission, Development Research Center of the State Council, Chinese Academy of Sciences and the Ministry of Finance. To plan and establish strategic energy bases at state level is in line with the principle of ＂giving priority to energy saving and diversifying energy consumption with the utility of coal at the core.＂     

Influence of Shale Oil Boom in North America upon nternational Crude Price Flucturation

正Current stituation of shale oil development in the world The US The country is blessed with abundant shale oil resources and had matersed whole sets of theories and technologies needed for their exploration and development after years of practices.According to an assessment of shale oil resources in major countries and regions of the world issued by the U.S.Energy Information Agency(EIA),the US ranks the second in the world with its 6.8 billion tons of technically recoverable shale oil(shale oil in place is about 136.3 tons).About 8plays had been confirmed to have     

A Sintering-resistant Pd/C Composite Catalyst for Ethylbenzene DehydrogenationDeveloped by CAS Institute of Metals

Carbon deposition is a commonplace phenomenon occurringin the catalytic reaction process, in particular inthe system of direct dehydrogenation of ethylbenzene,because the reactant - ethylbenzene molecules on thesurface of metal oxide catalysts are prone to quickly formcarbon deposits, leading to deactivation of catalysts. Recently,the associate research fellow Mr. Liu Hongyangand the research fellow Mr. Su Dangsheng of the StateShenyang Material Science （United ） Laboratory of theInstitute of Metal Research, CAS by taking advantageof the carbon deposition process during direct dehydrogenationof ethylbenzene have ingeniously designeda Pd/C composite catalyst. This catalyst in comparisonwith the traditional commercial carbon nanotubesupported Pd catalyst shows a significantly improved performancein terms of its catalytic activity and sinteringresistantability.     

ZPEB Overseas Markets Keep Steady and Efficient Development

In recent years, Zhongyuan Petroleum Exploration Bureau （ZPEB） has made rapid development in overseas petroleum markets through its integrated reorganization. A new international business plattbrm established, aimed at becoming a highly ranked contractor with international petroleum engineering technology. ZPEB has expanded its business scope and scale, regulated the market structure,     

New Era for China-Brazil Relations

China and Brazil celebrated the 40th anniversary of establishing diplomatic relations between the two countries in July this year. Bilateral relations between China and Brazil have entered a new stage, and experts expect the already extensive cooperation between the two countries to deepen and broaden as Chinese President Xi Jinping made a state visit to Brazil in mid-July, which is his first state visit to Brazil since he assumed the office last year. The visit to China＇s largest trade partner in Latin America is at the invitation of Brazilian President Dilma Rousseff.     

Large Scale Ethylene Production Package Technology SuccessfullyDeveloped by CNPC

The CNPC Group has successfully developed a largescaleethylene production package technology with independentintellectual property rights, which has beensuccessfully applied in the 1.2 Mt/a ethylene revamp andexpansion project at the Daqing Petrochemical Complex（DPC）.     

Recent Advancements in Petroleum E & P Equipments in China

The role of equipments in oil and gas exploration and development had never been attached with so much importance as that in shale oil and gas boom in the U.S. With the help of massive hydraulic fracturing and horizontal drilling techniques, the U.S., the world＇s No. 1 oil importer even started to dream about energy self-sufficiency with its proudly high production of shale oil and gas from several major shale plays in the country. However, what behind this remarkable achievement are powerful multi-stage hydraulic fracturing machinery and smart tools for directional drilling.