CN105651665A - Method for evaluating influence of drilling and completion fluid on oil and water permeability of rock core - Google Patents

Method for evaluating influence of drilling and completion fluid on oil and water permeability of rock core Download PDF

Info

Publication number
CN105651665A
CN105651665A CN 201410668895 CN201410668895A CN105651665A CN 105651665 A CN105651665 A CN 105651665A CN 201410668895 CN201410668895 CN 201410668895 CN 201410668895 A CN201410668895 A CN 201410668895A CN 105651665 A CN105651665 A CN 105651665A
Authority
CN
Grant status
Application
Patent type
Prior art keywords
core
water
permeability
drilling
oil
Prior art date
Application number
CN 201410668895
Other languages
Chinese (zh)
Other versions
CN105651665B (en )
Inventor
徐运波
蓝强
武学芹
李斌
于雷
王忠杰
刘保双
朱晓明
Original Assignee
中石化胜利石油工程有限公司钻井工艺研究院
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Abstract

The invention discloses a method for evaluating influence of a drilling and completion fluid on the oil and water permeability of a rock core. The method includes the steps: (1) preparing a rock core and a experimental fluid; (2) establishing irreducible water saturation and determining the oil phase permeability under an irreducible water state; (3) determining the original oil and water permeability of the rock core; and (4) determining the oil and water permeability after the drilling and completion fluid pollution; according to a value change of the oil and water relative permeability of the drilling and completion fluid before and after pollution, determining the influence of the drilling and completion fluid on the rock core. Good or bad reservoir protection effect of the drilling and completion fluid system can be evaluated; according to the method, a fluid flowing situation with the coexistence of an oil phase and a water phase in a reservoir can be fully simulated, and change laws of respective seepage abilities of the two phase fluids are obtained; compared with a traditional single-phase rock core flowing experiment, the result is more accurate, and has more guiding significance on drilling operation. The method is mainly used for evaluation of rock cores with the gas phase permeability of greater than 50 millidarcies.

Description

一种钻完井液对岩心油水渗透率影响评价方法 Affect one core drilling completion fluid water permeability evaluation method

技术领域 FIELD

[0001] 本发明涉及石油钻探过程中储层保护评价技术领域,特别是一种钻完井液对岩心油水渗透率影响评价方法。 [0001] The present invention relates to the field of protective oil reservoir evaluation drilling process, in particular a drilling and completion fluid on the evaluation method for water permeability core.

背景技术 Background technique

[0002] 储层保护是一项贯穿于油气井勘探开发全过程的系统工程。 [0002] reservoir protection is an exploration and development of oil and gas wells throughout the whole process of systems engineering. 地层损害的内因在于储层本身性质,如岩性、物性和地层水特性,而地层损害的外因在于进入储层的外来流体的影响。 Internal formation damage that very nature, such as lithology, physical properties and characteristics of the reservoir formation water, in that formation damage and external influence into the external fluid reservoir. 其中,钻井液与完井液的侵入损害是油层损害的第一环,在整个钻完井施工过程一直与地层接触和相互作用。 Wherein the drilling and completion fluid intrusion damage is damage to the first oil ring, the entire drilling and completion of the construction process has been in contact with the formation interactions. 在正压差打开储层时,钻完井液中的固相和液相不可避免地进入储层,从而堵塞油气层通道和诱发储层的各种敏感性,如速敏、水敏、酸敏、盐敏、碱敏等损害,可见钻完井液对储层的影响及损害程度评价是储层保护工作的重要环节。 When the positive pressure reservoir open, drilling and completion fluids in solid and liquid phases inevitably enter the reservoir, thus blocking the channel layer and induce a variety of hydrocarbon reservoirs sensitivity, such as speed-sensitive, water-sensitive, acid Min, salt sensitivity, alkali sensitivity and other damage, visible effects of drilling and completion fluids and reservoir evaluation of the extent of damage is an important part of the reservoir protection work. 目前各种评价方法都是基于对地层渗透率的测定,而实验室岩心测试分析则是各种渗透率测定方法中最直接、最可靠的方法。 Currently a variety of evaluation methods are based on the determination of formation permeability, and laboratory core test various methods of analysis is the determination of the permeability of the most direct and most reliable method. 通过模拟钻井过程的岩心流动实验,考察钻完井液对实验岩心渗透率影响,评价油气层的损害程度,从而优选钻完井液配方,制定合理的储层保护方案,是目前各探井与生产井储层保护工作的主要方式,更是关系到能否发现油气层、正确评价其储集性能和油气井能否获得高产的关键。 Simulation core flow experiments by the drilling process, drilling and completion fluids examine permeability core at impact test, evaluation of the extent of damage reservoir, whereby preferably the drilling and completion fluid formulations, develop a reasonable formation protection scheme, each exploratory well and production is the main way of reservoir protection work well, but also related to the ability to find oil and gas layer, the key reservoir properties and its ability to obtain high-yield oil and gas wells properly evaluated.

[0003] 目前石油钻井行业评价钻完井液对岩心渗透率影响主要是进行油相渗透率恢复率的测定。 [0003] Evaluation of the current drilling and completion of oil drilling industry Solution on core permeability was measured primarily oil permeability recovery rate. 在岩心流动实验中首先测定岩心原始渗透率,使用一定配方的钻完井液进行污染后,重新测定污染后岩心渗透率,从而得到油相渗透率恢复的情况。 First, the original measured core permeability core flow experiment, after a certain drilling completion fluid formulations of pollution, measured again after the contamination core permeability, resulting in the case of oil permeability recovery. 这种方法虽然能够最直观地反映钻完井液对岩心的损害情况和储层保护效果,却无法真实反映地层流体的流动状况,具有一定局限性。 Although this method can be most directly reflects the damage protecting effect and reservoir fluid to the drilling and completion of the core, but can not reflect the real situation of the flow of formation fluids, it has certain limitations. 因为无论进行油相或水相渗透率测定时,岩心中仅有一种流体在流动,测定得到的结果仅能够反映单相流体通过时渗透率变化情况;然而实际生产中储层流体往往是油水两相共存,因此考察两相流体通过时岩心渗透率变化情况才能够更为准确地反映井下真实情况。 Because both performed when the oil or water phase permeability measurement, cores only one fluid flow, the measurement results can be obtained only reflect the changes in permeability through the single-phase fluid; however, the actual production of reservoir fluid often two water phase coexistence, and therefore changes in core permeability to be able to more accurately reflect the real situation when underground through two-phase study.

[0004] 针对现有技术的不足,本发明拟利用相对渗透率测试方法考察油水两相流体共存的情况下其各自渗透率的变化情况,以得到更真实反映储层状况的储层保护数据。 [0004] for the deficiencies of the prior art, the present invention is intended to utilize the change of the relative permeability of oil-water flow test methods coexist examine their respective permeabilities to give a true reflection of the reservoir protecting data reservoir conditions. 相对渗透率测试在采油领域应用广泛,能够提供多孔介质中多相渗流动态及油田水驱开发指标预测的重要基础数据,相对渗透率曲线是油田开发参数计算、油藏数值模拟及动态分析等方面必不可少的资料。 Relative permeability test is widely used in oil field applications, the porous medium can provide an important basis for the dynamic water and oil flooding the multiphase flow index prediction data, the relative permeability curves are oilfield development parameter calculation, the dynamic aspects of reservoir simulation and analysis essential information. 所谓相对渗透率,是对应绝对渗透率而言。 The so-called relative permeability, corresponding in terms of absolute permeability. 当只有单相流体在岩石孔隙中流动而与岩石没有物理化学作用时所得到的渗透率即为绝对渗透率,而当多相流体共存和流动于地层中时,其中某一相流体在岩石中通过能力的大小,就称为该相流体的有效渗透率,有效渗透率与绝对渗透率的比值即为该相流体的相对渗透率。 When only a single-phase fluid flow with no physical and chemical effects of the rock permeability is the absolute permeability resulting in the rock pores, and when the multiphase fluid flow coexist and in the formation, wherein a fluid phase in the rock by size capability, called the effective permeability of the fluid phase, the ratio of the effective permeability is the absolute permeability and relative permeability of the fluid phase. 作为比值的分母可以是空气绝对渗透率、100%水/油渗透率以及束缚水状态下油的渗透率。 As the ratio of the denominator may be an absolute air permeability, water permeability at 100% / oil irreducible water permeability and oil state. 不难看出,目前常用的岩心流动实验方法得到的数据是油/水相的绝对渗透率,即测定水相渗透率时得到水的绝对渗透率,测定油相渗透率恢复率时得到束缚水状态下油的渗透率。 Easy to see, the most commonly used data experimentally obtained core flow is an oil / water phase absolute permeability, i.e. determination of the absolute permeability of water to obtain an aqueous phase permeability, irreducible water to give a state determination of the recovery rate of oil permeability under the permeability of oil. 而采用相对渗透率测试仪器及方法进行的岩心流动实验,能够充分模拟储层中油水两相共存时的流动情况,并得到两相流体各自渗流能力的变化规律,较之于传统的单相岩心流动实验,其结果更加准确,对钻井施工更具指导意义。 The use of core flow experiment relative permeability testing equipment and methods, it is possible to fully simulate flow in the reservoir when a two-phase oil and water, and the resulting variation of the respective two-phase fluid flow capacity, compared to conventional single-phase core flow experiments, the results are more accurate, more instructive for drilling.

[0005] 根据驱替方式不同,实验室测定岩心相对渗透率的方法主要包括稳态法与非稳态法。 [0005] The displacement in different ways, laboratory method for measuring the relative permeability of the core includes a non-steady state method and steady state conditions. 稳态法测试中将油水按一定流量比例同时恒速注入岩样,非稳态法测试中是将岩心事先用一种流体饱和,用另一种流体进行驱替。 Steady state conditions in the test water at the same time a certain flow proportional constant speed rock sample injection, unsteady state test core is saturated in advance in a fluid, for displacement with another fluid. 非稳态法的优点是测试时间短,仪器设备比较简单;但对于非均质性较严重,优先水湿或具有混合润湿性的岩心,或油水粘度比很大时,以及局部乳化状况下用非稳态法难以得到可靠的相对渗透率曲线;另外非稳态法的JBN计算方法繁琐,且在上述特殊状况下误差很大。 Advantage unsteady state test time is short, relatively simple equipment; however, more serious for heterogeneity, or preferentially wet the core having a mixed wettability, or water viscosity ratio is large, and a local emulsification conditions unsteady method is difficult to obtain reliable relative permeability curves; Further JBN calculating unsteady state process complicated, and a large error in the above-described specific conditions. 因此综合储层保护评价思路和可靠性两方面因素,最终选择采用稳态法,油水注入比例采用10 :1至1 :1〇,基本能够真实模拟储层流体实际渗流状态。 Thus Comprehensive Evaluation reservoir protection and reliability ideas two factors, the final steady-state selecting method, using water injection ratio 10: 1 to 1: 1〇, basically true simulation of the actual state of reservoir fluid flow. 另外需要注意的是,稳态法测定油水相对渗透率的基本理论依据是一维达西渗流理论,而低渗油藏渗流不符合达西定律,存在启动压力和非线性渗流段,对渗流特征有较大的影响,所得数据可能存在一定偏差,因此本方法主要适用于中高渗透率岩心的评价。 Also note that the determination of the basic theoretical steady-state method is a relative permeability Weida Xi percolation theory, the low permeability reservoir Darcy's law does not flow, starting pressure and linear flow sections of flow characteristics have a greater impact, the resulting data may be some deviation, the present method is mainly applied to the evaluation of high permeability cores.

[0006]目前,还没有其他采用相对渗透率测试方法来实现钻完井液对岩心油水渗透率影响评价的相关报道。 [0006] Currently, no other relative permeability test method employed to achieve impact assessment of core drilling and completion fluid water permeability reports.

发明内容 SUMMARY

[0007] 本发明的目的在于克服现有技术的不足,提供的一种更加准确的钻完井液对岩心油水渗透率影响评价方法;该方法能够更加真实反映储层流体渗流状况;该方法主要用于中高渗透率岩心评价。 [0007] The object of the present invention is to overcome the disadvantages of the prior art, of providing a more accurate method of drilling and completion fluids impact assessment of water permeability core; which more faithfully reflect the condition of reservoir fluid flow; The main method high-permeability core for evaluation.

[0008] 本发明的一种钻完井液对岩心油水渗透率影响评价方法包括: [0008] Effects of the present invention, one kind of core drilling and completion fluids comprising oil and water permeability evaluation method:

[0009] (1)岩心与实验流体的准备: [0009] (1) Preparation of Core Experiment fluid:

[0010] 将待测岩心烘干,称干重,并测定其长度、直径、气相渗透率、孔隙度参数,根据具体评价实验情况配制实验流体-模拟地层水与模拟油,将岩心抽真空饱和模拟地层水,称湿重,确定岩心有效孔隙体积; [0010] The core was tested dry, said dry weight, and measuring the length, diameter, gas permeability, porosity parameters, test fluid formulated according to the specific experimental conditions Evaluation - Simulation model oil and formation water, saturated evacuating the core simulated formation water, said wet weight to determine the effective pore volume of the core;

[0011] (2)建立束缚水饱和度和测定束缚水状态下的油相渗透率: [0011] (2) to establish irreducible water saturation and permeability of the oil phase was measured to be bound state of the water:

[0012] 将岩心装入动态岩心流动实验装置的岩心夹持器中,先测定其水相渗透率,然后用油驱水法建立束缚水饱和度:先用低流量进行油驱水,逐渐增加驱替流量直至不出水为止,得到束缚水饱和度;将建立了束缚水饱和度的岩心装入相对渗透率测定仪的岩心夹持器中用模拟油驱替达10-15倍孔隙体积后,测定束缚水饱和度下的油相渗透率; [0012] The core was loaded into the core holder moving core flow test apparatus, water permeability was measured first, and then to establish irreducible water saturation oil water displacement method: first driving oil for low flow of water, increasing displacement flow until until no water, to give the irreducible water saturation; will establish irreducible water saturation of the core is loaded with relative permeability of the core holder analyzer model oil 10-15 pore volumes for rear-wheel drive, bound oil permeability was measured under the water saturation;

[0013] ⑶岩心原始油水渗透率的测定: [0013] ⑶ raw water permeability of the core measured:

[0014] 保持总流量一定的条件下,将油、水依次按三组设定的流量比例注入岩心,待流动稳定时,记录岩心进出口压力,油、水流量,天平质量,计算得到对应三组油水流量比的油相、水相有效和相对渗透率及相应的含水饱和度; [0014] Under certain conditions to maintain the total flow rate of the oil and water successively flow proportional injected into the core of the three groups is set, to be stable flow, recording core outlet pressure, oil, water flow, mass balance was calculated to give the corresponding three group oil flow rate ratio of an oil phase, an aqueous phase and an effective relative permeability and corresponding water saturation;

[0015] (4)钻完井液污染后油水渗透率的测定: [0015] (4) after drilling and completion fluids contaminated water permeability measured:

[0016] 选取实验用钻完井液,取下岩心并装入动态岩心流动实验装置的岩心夹持器中, 在一定温度下循环一段时间形成泥饼,然后将岩心取出重新装入相对渗透率测定仪的岩心夹持器中,按照(3)中方法测定对应三组油水流量比的油相、水相有效和相对渗透率及相应的含水饱和度; [0016] Select experimental drilling and completion fluids, the core is removed and the core holder dynamically loaded core flow test apparatus formed in the circulating mud cake at a temperature and a period of time, then removed the core relative permeability reload analyzer core holder in accordance with (3) the three groups corresponding to the method for measuring water flow rate ratio of the oil phase, the aqueous phase and the effective relative permeability and corresponding water saturation;

[0017] 根据钻完井液污染前后油水相对渗透率的数值变化,来判断该钻/完井液对岩心的影响,污染后岩心水相相对渗透率下降较大时,认为该钻/完井液形成的泥饼具有较强的堵水作用,污染后油相相对渗透率下降较小时,认为该钻/完井液具有自解堵能力。 [0017] The values ​​before and after drilling and completion fluids contaminated water relative permeability to determine the impact of the drilling / completion fluid core, the core of water drops large relative permeability after the contamination, that the drilling / completion cake was formed with a strong plugging effect, when small drops of oil relative permeability after the contamination, that the drilling / completion fluid having a self-blocking capability.

[0018] 该评价方法中,岩心准备,实验流体配制,建立束缚水饱和度,油水渗透率测定,以及岩心有效孔隙体积、含水饱和度、油水渗透率的计算公式均是依据SY/T 5345-2007"岩石中两相流体相对渗透率测定方法"中相关内容。 [0018] In this evaluation method, the core preparation, experiment fluid formulation, to establish irreducible water saturation, water permeability was measured, and the effective core pore volume, water saturation, water permeability is calculated are based SY / T 5345- 2007 "rock in two-phase relative permeability measurement method" related content.

[0019] 所述动态岩心流动实验装置采用JHMD- II高温高压岩心动态损害评价系统,所述相对渗透率测定仪的主要技术指标:最大环压:60MPa,驱替压力:0-50MPa,最大工作温度: 150°C,适用岩心尺寸:Φ 25. 4mmX (25_80)mm,驱替流量:0_10mL/min。 [0019] The core flow test device employs dynamic JHMD- II HTHP dynamic core damage evaluation system, the main technical indicators relative permeability analyzer: a maximum ring pressure: 60MPa, displacement pressure: 0-50MPa, the maximum operating temperature: 150 ° C, suitable for the core size: Φ 25. 4mmX (25_80) mm, displacement flow: 0_10mL / min.

[0020] 所述步骤⑵中测定束缚水饱和度下的油相渗透率,步骤(3)、(4)中测定钻完井液污染前后油水渗透率时测试温度及步骤(4)中钻完井液污染岩心时循环温度为25°C -120°C。 [0020] The step ⑵ oil permeability measured bound water saturation in the step (3), (4) Determination of test temperature and the step (4) water permeability before and after drilling and completion fluids polluted drilled cycling temperature of 25 ° C -120 ° C when the core contaminated well fluid.

[0021] 所述步骤(2)中建立束缚水饱和度和测定束缚水状态下的油相渗透率时环压为1.5MPa-12. 5MPa;步骤(3)、(4)中测定钻完井液污染前后油水渗透率时测试环压为5-15MPa ;步骤(4)中钻完井液污染岩心时环压为6-12MPa。 Step (3), (4) determined in the drilling and completion; [0021] The step (2) to establish irreducible water saturation and the measured pressure ring bound 1.5MPa-12 5MPa when the oil in the aqueous phase state permeability. liquid water permeability before and after contamination of the test loop pressure 5 to 15 MPa; 6-12MPa step pressure ring (4) contamination core drilling and completion fluids.

[0022] 所述步骤(2)中建立束缚水饱和度时油驱水驱替流量为0. 1-3. OmL/min,低速驱替流量为〇. 1-0. 3mL/min,测定束缚水状态下的油相渗透率时驱替流量为0. 2-2. OmL/min。 [0022] The step (2) is established when the oil flood water irreducible water saturation displacement flow of 0. 1-3. OmL / min, the flow rate is low displacement billion. 1-0. 3mL / min, measured bound oil at a flow rate of water displacement state 0. 2-2. OmL / min permeability phase.

[0023] 所述步骤(3)、(4)中测定钻完井液污染前后油水渗透率时油水总流量为0· 5-5. OmL/min ;三组油水流量比在10:1-1:10之间。 When [0023] the step (3), (4) the water permeability was measured before and after drilling and completion fluids polluted water a total flow rate of 0 · 5-5 OmL / min; flow rate of water than in the three groups 10: 1-1. : 10 between.

[0024] 所述步骤(3)、(4)中测定钻完井液污染前后油水渗透率时油水总流量可选择1. 0-3. OmL/min ;三组油水流量比可选择10:1,5:1,3:1,2:1,3:2,1:1,2:3,1:2,1:3,1:5, 1:10之中任意三组比例。 [0024] The step (3), (4) measured before and after drilling and completion fluids contaminated water of the total flow selectively 1. 0-3 OmL / min while water permeability; water three selectable flow ratio 10: 1 , 5: 1,3: 1,2: 1,3: 2,1: 1,2: 3,1: 2,1: 3,1: 5, 1:10 among arbitrary three groups ratio.

[0025] 所述步骤(4)中钻完井液污染岩心时循环时间为2_5h。 [0025] When the step (4) of core drilling and completion fluids contaminated cycle time 2_5h.

[0026] 所述步骤(2)、(3)、(4)中岩心装入相对渗透率测定仪的岩心夹持器时可在不超过长度范围时在岩心两端各加一块高渗岩心,以降低末端效应的影响。 May be not more than the core length at both ends of each of the core plus a hypertonic when [0026] the step (2), (3), (4) charged in the core relative permeability meter core holder, to reduce the influence of end effects.

[0027] 本发明与现有技术相比具有如下优势:本发明所述评价方法基于对岩心油水相对渗透率的测定,实验在相对渗透率测定仪中进行,能够充分模拟储层中油水两相共存时的流体流动情况,并得到两相流体各自渗流能力的变化规律,较之于传统的单相岩心流动实验,其结果更加准确,对钻井施工更具指导意义。 [0027] The present invention as compared with the prior art has the following advantages: the method of the present invention is evaluated based on the measurement of the relative permeability of the core, the relative permeability experiments were carried out in the analyzer, the analog can be sufficiently oil-water reservoir fluid flow when coexistence, and with each variation of two-phase flow capacity, compared to the traditional single-phase core flow experiments, the results are more accurate, more instructive for drilling. 该方法主要用于气相渗透率大于50毫达西的岩心的评价。 This method is mainly used for evaluation of gas permeability greater than 50 milli-Darcy cores.

具体实施方式 detailed description

[0028] 实例1 : [0028] Example 1:

[0029] 评价实验浆(配方:6%钠膨润土浆+0.2 %氢氧化钠+0.2 %聚丙烯酰胺PAM+1. 0% LV-CMC+3% SMP-2+3%聚合醇+1. 5%抗高温降失水剂取-1^6+2%纳米乳液+2% 油溶性树脂)的储层保护效果,实验岩心选用气相渗透率为1385. 20毫达西的人造砂岩岩心,孔隙度为27. 32%,尺寸为:长度6. 21cm,直径2. 53cm。 [0029] Evaluation of test plasma (formulation: 6% sodium hydroxide and 0.2% bentonite slurry +0.2% polyacrylamide PAM + 1 0% LV-CMC + 3% SMP-2 + 3% polymeric alcohol + 1 5. % high-temperature fluid loss -1 and ^ 6 + 2% + 2% nanoemulsion oil-soluble resin) the protective effect of the reservoir, the choice of vapor permeability test core md 1385.20 artificial sandstone core, porosity of 27.32%, dimensions: length 6. 21cm, diameter of 2. 53cm.

[0030] (1)岩心与实验流体的准备: [0030] (1) Preparation of Core Experiment fluid:

[0031] 将待测岩心烘干,称干重,实验温度选择25°C,模拟地层水总矿化度为lOOOmg/ L,25°C时粘度为模拟油使用原油与煤油配制而成,密度为〇.84以™3, 25 °C时粘度为2.26mPa.s, 油水粘度比为3. 5:1 ;将岩心抽真空饱和模拟地层水, 称湿重,确定岩心有效孔隙体积。 [0031] The core was tested dry, said dry, 25 ° C test temperature is selected, the analog total salinity water lOOOmg / L, 25 ° C, using an oil having a viscosity of crude oil and kerosene analog preparation, density 〇.84 as to when ™ 3, 25 ° C viscosity 2.26mPa.s, oil viscosity ratio of 3.5: 1; the core was vacuum saturated simulated formation water, said wet weight to determine the effective pore volume of the core.

[0032] (2)建立束缚水饱和度和测定束缚水状态下的油相渗透率: [0032] (2) to establish irreducible water saturation and permeability of the oil phase was measured to be bound state of the water:

[0033] 将岩心装入动态岩心流动实验装置的岩心夹持器中,先在25°C下测定其水相渗透率心,然后用油驱水法建立束缚水饱和度:加环压1. 5MPa,用模拟油以0. 2mL/min的速度驱替,待累计出水速度减缓后逐渐增加流量直至2. OmL/min,不断记录驱出水量,计算岩心中的束缚水饱和度Sws,直至不出水为止。 [0033] The core was loaded into the core holder apparatus of a dynamic core flow experiment in which water permeability core, and then to establish irreducible water saturation oil water displacement method before the measurement at 25 ° C: 1 plus pressure ring. 5 MPa, at a speed analog oil 0. 2mL / min of displacement, until the accumulated water gradually increases the flow rate slows until 2. OmL / min, recording continuously driving out the water, calculating the irreducible water saturation Sws cores until no water so far. 将建立了束缚水饱和度的岩心装入相对渗透率测定仪的岩心夹持器中,加环压5. 5MPa,打开恒温箱,保持25°C恒温2小时以上,以1. OmL/min 的流量用模拟油驱替达10倍孔隙体积后,测定束缚水饱和度下的油相渗透率KJSJ。 The establishment of the irreducible water saturation charged relative permeability analyzer core holder, add pressure ring 5. 5MPa, open incubators maintain a constant temperature above 25 ° C for 2 hours to 1. OmL / min of flow simulation of oil displacement by up to 10 times the pore volume, measured in the bound water saturation in the oil phase permeability KJSJ. [0034] (3)岩心原始油水渗透率的测定: [0034] (3) the core of the original water permeability measured:

[0035] 设定环压为5MPa,保持总流量为2. OmL/min,在25°C下将油相/水相流量比为10:1的混合流体注入岩心,待压力、流量稳定后,记录岩心进出口压力,油、水流量,天平质量,卸环压,取出岩心称重,计算含水饱和度sw以及油相有效渗透率κ 水相有效渗透率、油相相对渗透率心。 [0035] The pressure ring is set to 5 MPa, to maintain a total flow rate of 2. OmL / min, at 25 ° C for the oil phase / aqueous phase flow rate ratio of 10: 1 mixed fluid injected into the core, until the pressure, the flow rate is stable, recording core outlet pressure, oil, water flow, mass balance, handling ring pressure, taking the core weighed to calculate the water saturation and oil phase sw effective permeability effective permeability κ aqueous phase, the oil relative permeability core. 和水相相对渗透率Kra;改变油相/水相流量比为3:2和1:10,重复上述步骤,得到对应两组油水流量比的油相、水相有效和相对渗透率和含水饱和度。 Kra relative permeability and water; change oil phase / water phase flow rate ratio of 3: 2 and 1:10, repeating the above steps, the corresponding two sets of water flow to give an oil phase than the aqueous phase and the effective relative permeability and water saturation degree.

[0036] (4)钻完井液污染后油水渗透率的测定: [0036] (4) after drilling and completion fluids contaminated water permeability measured:

[0037] 选取实验用钻井液,取下岩心并装入动态岩心流动实验装置的岩心夹持器中,设定环压为6MPa,在25°C下循环2h形成泥饼;然后将岩心取出重新装入相对渗透率测定仪的岩心夹持器中,按照(3)中方法测定对应三组油水流量比的油相、水相有效和相对渗透率及相应的含水饱和度。 [0037] Select experiment drilling, remove the core and the core holder dynamically loaded core flow test device, the ring is set to 6MPa pressure, at 25 ° C for 2h circulating mud cake is formed; The core was then re-extracted loaded core relative permeability measuring instrument holder, and the aqueous phase and the effective relative permeability and water saturation in accordance with the corresponding (3) the method for determining the oil corresponding to the three sets of water flow ratio.

[0038] 实例2 : [0038] Example 2:

[0039] 评价实验浆(配方:5%钠膨润土浆+0· 3% IND30+3% SMP-2+3%纳米乳液+0· 5% 胺基聚醇+〇. 4%铝基聚合物+2%疏水改性淀粉HNC-1+1. 5%纳米碳酸钙)的储层保护效果,实验岩心选用胜利青东8井沙三段岩心,取自深度1212. 10~1214. 15米,孔隙度为26. 15%,气相渗透率为399. 78毫达西,尺寸为:长度6. 23cm,直径2. 53cm。 [0039] Evaluation test slurry (Formulation: 5% sodium bentonites + 0 · 3% IND30 + 3% SMP-2 + 3% nanoemulsion + 0 · 5% amine + square polyol polymer + 4% aluminum 2% hydrophobically modified starches HNC-1 + 1. 5% nano-calcium carbonate) reservoir protective effect, selection of the core experiment 8 East green victory well sand core three sections, taken from a depth of 1212.10 - 1214.15 m, porosity a degree of 26.15%, gas permeability of 399.78 md dimensions: length 6. 23cm, diameter of 2. 53cm.

[0040] (1)岩心与实验流体的准备: [0040] (1) Preparation of Core Experiment fluid:

[0041] 将待测岩心烘干,称干重,根据青东8井油藏地质情况选择实验温度并配制实验流体-模拟地层水与模拟油;其中,实验温度选择46°C,模拟地层水总矿化度为4755mg/ L,氯离子含量为1991mg/L,钾钠含量为1223. 72mg/L,重碳酸根含量为258mg/L,pH值为8. i,46°c时粘度为〇.73mPa.s;模拟油使用该区块脱气原油与煤油配制而成,密度为0. 92g/cm3,46°C时粘度为;35lTLPa«S,油水粘度比为48:1 ;将岩心抽真空饱和模拟地层水,称湿重,确定岩心有效孔隙体积。 [0041] The core was dried under test, called the dry weight, according to the selected test temperature geology East Green 8 and formulated test fluid reservoir well - Simulation model oil and formation water; wherein the selected test temperature 46 ° C, simulated formation water The total salinity of 4755mg / L, chloride ion content of 1991mg / L, content of potassium sodium 1223. 72mg / L, bicarbonate content of 258mg / L, pH value of 8. i, when the viscosity of square 46 ° c .73mPa.s; simulation using the block degassed crude oil kerosene preparation, when density of 0. 92g / cm3,46 ° C viscosity; 35lTLPa «S, oil viscosity ratio of 48: 1; the core was evacuated vacuum formation water saturated analog, said wet weight to determine the effective pore volume of the core.

[0042] (2)建立束缚水饱和度和测定束缚水状态下的油相渗透率: [0042] (2) to establish irreducible water saturation and permeability of the oil phase was measured to be bound state of the water:

[0043] 将岩心装入动态岩心流动实验装置的岩心夹持器中,先在46°C下测定其水相渗透率Kw,然后用油驱水法建立束缚水饱和度:加环压5. OMPa,用模拟油以0. 3mL/min的速度驱替,待累计出水速度减缓后逐渐增加流量直至3. OmL/min,不断记录驱出水量,计算岩心中的束缚水饱和度Sws,直至不出水为止。 [0043] The core was loaded into the core holder moving core flow test device which Kw water permeability, oil and establish irreducible water saturation water displacement method before the measurement at 46 ° C: 5 plus ring pressure. OMPa, analog oil at a rate of 0. 3mL / min of displacement, until the accumulated water gradually increases the flow rate slows until 3. OmL / min, recording continuously driving out the water, calculating the irreducible water saturation Sws cores until no water so far. 将建立了束缚水饱和度的岩心装入相对渗透率测定仪的岩心夹持器中,加环压8MPa,打开恒温箱,保持46°C恒温2小时以上,以2. OmL/min的流量用模拟油驱替达15倍孔隙体积后,测定束缚水饱和度下的油相渗透率KJSJ。 Will establish irreducible water saturation of the core relative permeability charged analyzer core holder, add 8MPa ring crush, open incubators maintain a constant temperature above 46 ° C for 2 hours and a flow rate of 2. OmL / min with simulation of oil displacement after 15 pore volumes, measured bound water saturation in the oil phase permeability KJSJ.

[0044] (3)岩心原始油水渗透率的测定: [0044] (3) the core of the original water permeability measured:

[0045] 设定环压为lOMPa,保持总流量为3. OmL/min,在46°C下将油相/水相流量比为5:1的混合流体注入岩心,待压力、流量稳定后,记录岩心进出口压力,油、水流量,天平质量,卸环压,取出岩心称重,计算含水饱和度S w以及油相有效渗透率K ^水相有效渗透率、油相相对渗透率心。 [0045] The set ring Lompa pressure, keeping the total flow rate 3. OmL / min, at 46 ° C the oil phase / aqueous phase flow rate ratio of 5: 1 mixed fluid injected into the core, until the pressure, the flow rate is stable, recording core outlet pressure, oil, water flow, mass balance, handling ring pressure, taking the core weighed to calculate the water saturation S w oil phase and aqueous phase effective permeability K ^ effective permeability, relative permeability of oil heart. 和水相相对渗透率Kra;改变油相/水相流量比为2:3和1:5,重复上述步骤,得到对应两组油水流量比的油相、水相有效和相对渗透率和含水饱和度。 Kra relative permeability and water; change oil phase / water phase flow rate ratio of 2: 3 and 1: 5, repeating the above steps, the corresponding two sets of water flow to give an oil phase than the aqueous phase and the effective relative permeability and water saturation degree.

[0046] (4)钻完井液污染后油水渗透率的测定: [0046] (4) after drilling and completion fluids contaminated water permeability measured:

[0047] 选取实验用钻井液,取下岩心并装入动态岩心流动实验装置的岩心夹持器中,设定环压为8MPa,在46°C下循环3h形成泥饼;然后将岩心取出重新装入相对渗透率测定仪的岩心夹持器中,按照(3)中方法测定对应三组油水流量比的油相、水相有效和相对渗透率及相应的含水饱和度。 [0047] Select experiment drilling, remove the core and the core holder dynamically loaded core flow test device, set ring 8MPa pressure, at 46 ° C 3h circulating mud cake is formed; The core was then re-extracted loaded core relative permeability measuring instrument holder, and the aqueous phase and the effective relative permeability and water saturation in accordance with the corresponding (3) the method for determining the oil corresponding to the three sets of water flow ratio.

[0048] 实例3 : [0048] Example 3:

[0049] 评价现场浆(配方:5~8 %钠膨润土浆+0· 2 %~0· 3 %氢氧化钠+0· 3 %~0· 5 % 天然高分子包被抑制剂IND30+1. 0 %~1. 5 %抗高温降失水剂HX-KYG+2 %~3 %聚合醇+1%~2%天然高分子降滤失剂NAT20+3%~5%理想充填剂+2%~3%防水锁剂YFS-3) 的储层保护效果,实验岩心选用胜利埕北326井东营组岩心,取自深度3489. 00~3502. 00 米,孔隙度为17. 87%,气相渗透率为93. 90毫达西,尺寸为:长度6. 26cm,直径2. 53cm。 [0049] Field Evaluation slurry (Formulation: 5-8% sodium bentonites + 0 · 0 · 2% to 3% sodium hydroxide + 0 · 0 · 3% to 5% of polymer coated natural inhibitor IND30 + 1. from 0% to 1.5% high-temperature fluid loss HX-KYG + 2% ~ 3% polymeric alcohol + 1% to 2% natural polymeric filtrate reducer NAT20 + 3% ~ 5% over the filler + 2% ~ 3% water lock agent YFS-3) the effect of reservoir protection, selected core experimental wells 326 victory Chengbei DONGYING core taken from a depth of 3489.00 - 3502.00 m, a porosity of 17.87%, CVI was 93.90 mD dimensions: length 6. 26cm, diameter of 2. 53cm.

[0050] (1)岩心与实验流体的准备: [0050] (1) Preparation of Core Experiment fluid:

[0051] 将待测岩心烘干,称干重,根据埕北326井油藏地质情况选择实验温度并配制实验流体-模拟地层水与模拟油;其中,实验温度选择120°C,模拟地层水总矿化度为10616mg/L,氯离子含量为6215mg/L,pH值为8,120°C时粘度为〇.6 1 mPa.S;模拟油使用该区块脱气原油与煤油配制而成,密度为〇. 86g/Cm3, i2〇°c时粘度为Oy^inPa.s, 油水粘度比为1.2:1 ;将岩心抽真空饱和模拟地层水,称湿重,确定岩心有效孔隙体积。 [0051] The core was dried under test, called the dry weight, according to the geological conditions selected test temperature Chengbei 326 well fluid reservoir and formulated Experiment - Simulation model oil and formation water; wherein the selected test temperature 120 ° C, simulated formation water the total salinity of 10616mg / L, chloride ion content of 6215mg / L, the pH value of 8,120 ° C having a viscosity of 〇.6 1 mPa.S; simulation using the block degassed crude oil kerosene formulated, density For square 86g / Cm3, when i2〇 ° c viscosity Oy ^ inPa.s, oil viscosity ratio of 1.2: 1; the simulated formation water saturation core evacuated in vacuo, and the wet weight to determine the effective pore volume of the core.

[0052] (2)建立束缚水饱和度和测定束缚水状态下的油相渗透率: [0052] (2) to establish irreducible water saturation and permeability of the oil phase was measured to be bound state of the water:

[0053] 将岩心装入动态岩心流动实验装置的岩心夹持器中,先在120°C下测定其水相渗透率K w,然后用油驱水法建立束缚水饱和度:加环压10.0 MPa,用模拟油以0. lmL/min的速度驱替,待累计出水速度减缓后逐渐增加流量直至1. OmL/min,不断记录驱出水量,计算岩心中的束缚水饱和度Sws,直至不出水为止。 [0053] The core was loaded dynamic core flow experiments core holder device, first at 120 ° C for determination of their water permeability K w, and oil flooding to establish irreducible water saturation water Method: Add 10.0 Ring Crush MPa, at a speed analog oil 0. lmL / min of displacement, until the accumulated water gradually increases the flow rate slows until 1. OmL / min, recording continuously driving out the water, calculating the irreducible water saturation Sws cores until no water so far. 将建立了束缚水饱和度的岩心装入相对渗透率测定仪的岩心夹持器中,加环压12. 5MPa,打开恒温箱,保持120°C恒温2小时以上,以0. 2mL/min的流量用模拟油驱替达15倍孔隙体积后,测定束缚水饱和度下的油相渗透率K〇(Sws)。 The establishment of the irreducible water saturation charged relative permeability analyzer core holder, add pressure ring 12. 5MPa, open incubators maintain a constant temperature above 120 ° C for 2 hours to 0. 2mL / min of for up to 15 times the pore volume, measured in the oil phase bound water saturation, permeability K〇 (Sws) with the model oil displacement flow.

[0054] (3)岩心原始油水渗透率的测定: [0054] (3) the core of the original water permeability measured:

[0055] 设定环压为15MPa,保持总流量为1. OmL/min,在120°C下将油相/水相流量比为3:1的混合流体注入岩心,待压力、流量稳定后,记录岩心进出口压力,油、水流量,天平质量,卸环压,取出岩心称重,计算含水饱和度S w以及油相有效渗透率K ^水相有效渗透率、油相相对渗透率Kro和水相相对渗透率K 改变油相/水相流量比为1:1和1:3,重复上述步骤,得到对应两组油水流量比的油相、水相有效和相对渗透率和含水饱和度。 [0055] ring is set to 15MPa pressure, keeping the total flow rate of 1. OmL / min, at 120 ° C for the oil phase / aqueous phase flow rate ratio of 3: 1 mixed fluid injected into the core, until the pressure, the flow rate is stable, recording core outlet pressure, oil, water flow, mass balance, handling ring pressure, taking the core weighed to calculate the water saturation S w oil phase and aqueous phase effective permeability K ^ effective permeability, relative permeability of oil and Kro aqueous K changes relative permeability of the oil phase / aqueous phase flow rate ratio of 1: 1 and 1: 3, repeating the above steps, the corresponding two sets of water flow to give an oil phase than the aqueous phase and the effective relative permeability and water saturation.

[0056] (4)钻完井液污染后油水渗透率的测定: [0056] (4) after drilling and completion fluids contaminated water permeability measured:

[0057] 选取实验用钻井液,取下岩心并装入动态岩心流动实验装置的岩心夹持器中,设定环压为12MPa,在120°C下循环5h形成泥饼;然后将岩心取出重新装入相对渗透率测定仪的岩心夹持器中,按照(3)中方法测定对应三组油水流量比的油相、水相有效和相对渗透率及相应的含水饱和度。 [0057] Select experiment drilling, remove the core and the core holder dynamically loaded core flow test device, the ring is set to 12MPa pressure, at 120 ° C for 5h circulating mud cake is formed; The core was then re-extracted loaded core relative permeability measuring instrument holder, and the aqueous phase and the effective relative permeability and water saturation in accordance with the corresponding (3) the method for determining the oil corresponding to the three sets of water flow ratio.

[0058] 实施例的评价结果 [0058] Evaluation results of Examples

[0059] 表1实施例评价结果「00601 [0059] The results of Table 1 were evaluated "00601

Figure CN105651665AD00091

[0062] 由表1结果可以看出,实施例中岩心经钻井液污染后的油相和水相渗透率均有一定程度的降低。 [0062] As can be seen from the results in Table 1, a degree of reduced core embodiment water phase and the oil-contaminated drilling fluid permeability to both embodiments. 三个实施例中水相相对渗透率都表现出很大程度的降低,说明三种钻井液体系的堵水能力都比较出色,尤其是实施例2中的钻井液体系,对水相封堵率更是高达96.8%左右,说明其在钻井施工中能够有效阻止滤液侵入储层;实施例1中钻井液污染后油相相对渗透率得到一定的恢复,但恢复程度不高;实施例2中污染后油相相对渗透率依然能够保持较高的数值,说明该钻井液具备一定的自解堵能力,其油相渗透率随着完井施工作业时间延长逐渐升高,使其能够自动返排解堵,推测原因是该钻井液体系中疏水改性淀粉和纳米碳酸钙这两种处理剂能够在钻进过程中改善泥饼质量,在泥饼中形成疏水通道,为地层原油流出建立有效油流通道;实施例3中污染后油相相对渗透率下降幅度很大, 甚至超过了水相渗透率降低幅度,可见该钻井液体系所形成泥饼对油水的封 Three embodiments of water relative permeability exhibited considerably reduced, indicating three kinds of water blocking ability of the drilling fluid system are relatively good, especially in the drilling fluid in Example 2, plugging rate of the aqueous phase is as high as 96.8%, which is explained in the drilling operation can effectively prevent filtrate invasion reservoir; the Example 1 embodiment the drilling fluid contaminated oil relative permeability of a certain recovery, but the degree of recovery is not high; contaminating Example 2 after the oil relative permeability can still maintain a high value, indicating that the drilling fluid to have some ability to self-blocking, which gradually rises as the oil permeability completion prolonged construction work, it is possible to automatically return blocking troubleshooting , presumably due to the drilling fluid system is a starch hydrophobically modified nano calcium carbonate and the treating agent can improve both the quality of the cake during drilling, mud cake formed in the hydrophobic channel, the formation of crude oil to establish an effective effluent flow channel ; Example 3 after the oil contamination embodiments great reduction in the amplitude of relative permeability, water permeability even more than the decrease width, the drilling fluid is visible on the mud cake formed water seal 堵能力都很强,而且需要在完井后进行酸化、压裂等手段解堵。 Blocking capabilities are strong, and the need for plugging acidizing, fracturing and other means after completion. 综上所述,实施例2中钻井液储层保护效果最好,很适合用于青东8井的钻井施工。 In summary, Example 8 East Green drilling the well drilling fluid of reservoir 2 the best protective effect, it is suitable for the embodiment.

[0063] 由此可见,本发明所提供的钻完井液对岩心油水渗透率影响评价方法能够用于评价钻完井液体系的储层保护作用好坏,根据钻完井液污染前后油水相对渗透率的数值变化,来判断钻完井液对岩心的影响,从而进一步指导现场钻井液施工。 [0063] Thus, drilling and completion fluids of the present invention provides the effect on water permeability core reservoir can be used to evaluate the protective effect of the method is good or bad evaluation drilling and completion fluid system, before and after drilling and completion fluids according to the relative water pollution change in value of permeability, drilling and completion fluids to determine the impact on the core, so that further guidance drilling site construction. 该方法能够充分模拟储层中油水两相共存时的流体流动情况,并得到两相流体各自渗流能力的变化规律,较之于传统的单相岩心流动实验,其结果更加准确,在钻完井液储层保护作用评价方面具有实际价值。 This method can adequately simulate the fluid flow when the reservoir water two-phase, two-phase fluid and with variation of each flow capacity, compared to the conventional single-phase core flow experiment, the results more accurate, the drilling and completion evaluation of protective effect of liquid reservoir has a real value.

Claims (9)

  1. 1. 一种钻完井液对岩心油水渗透率影响评价方法,其特征是包括: (1) 岩心与实验流体的准备: 将待测岩心烘干,称干重,并测定其长度、直径、气相渗透率、孔隙度参数,根据具体评价实验情况配制实验流体一模拟地层水与模拟油,将岩心抽真空饱和模拟地层水,称湿重,确定岩心有效孔隙体积; (2) 建立束缚水饱和度和测定束缚水状态下的油相渗透率: 将岩心装入动态岩心流动实验装置的岩心夹持器中,先测定其水相渗透率,然后用油驱水法建立束缚水饱和度:先用低流量进行油驱水,逐渐增加驱替流量直至不出水为止,得到束缚水饱和度;将建立了束缚水饱和度的岩心装入相对渗透率测定仪的岩心夹持器中用模拟油驱替达10-15倍孔隙体积后,测定束缚水饱和度下的油相渗透率; (3) 岩心原始油水渗透率的测定: 保持总流量一定的条件下,将 Effect Evaluation Method 1. A drilling completion fluid water permeability core, which is characterized in comprising: (1) preparation of core fluid Experimental: drying the core to be tested, said dry weight, and measuring the length, diameter, vapor permeability, porosity parameters, a simulation model oil and formation water test fluid formulated in accordance with the specific evaluation test case, the core simulation formation water saturation was evacuated, said wet weight to determine the effective pore volume of the core; (2) to establish irreducible water saturation Determination of bound oil phase and the water permeability state: the core holder dynamically loaded core core flow test apparatus, water permeability was measured first, and then to establish irreducible water saturation oil water displacement method: first for low oil flow water displacement, the displacement gradually increases until until no water flow, obtained irreducible water saturation; established using the irreducible water saturation of the core relative permeability charged core holder analyzer model oil flooding after 10-15 for pore volumes, oil permeability was measured under the bound water saturation; assay (3) the original water permeability core: holding the total flow rate under certain conditions, the 、水依次按三组设定的流量比例注入岩心,待流动稳定时,记录岩心进出口压力,油、水流量,天平质量,计算得到对应三组油水流量比的油相、水相有效和相对渗透率及相应的含水饱和度; (4) 钻完井液污染后油水渗透率的测定: 选取实验用钻完井液,取下岩心并装入动态岩心流动实验装置的岩心夹持器中,在一定温度下循环一段时间形成泥饼,然后将岩心取出重新装入相对渗透率测定仪的岩心夹持器中,按照(3)中方法测定对应三组油水流量比的油相、水相有效和相对渗透率及相应的含水饱和度; 根据钻完井液污染前后油水相对渗透率的数值变化,来判断该钻/完井液对岩心的影响,污染后岩心水相相对渗透率下降较大时,认为该钻/完井液形成的泥饼具有较强的堵水作用,污染后油相相对渗透率下降较小时,认为该钻/完井液具有自解堵能力。 , Water in that order flow proportional injected into the core of the three groups is set, to be stable flow, recording core outlet pressure, oil, water flow, mass balance was calculated to give an oil corresponding to the three oil flow rate ratio and the aqueous phase is relatively efficient and permeability and corresponding water saturation; measurement (4) drilling and completion fluids contaminated water permeability of: selecting experimental drilling and completion fluids, the core is removed and the core holder dynamically loaded core flow test device, cycle period is formed at a temperature in the cake, and then remove the reload core relative permeability analyzer core holder in accordance with (3) the three groups corresponding to the method for measuring water flow rate ratio of the oil phase, the aqueous phase effective and the corresponding relative permeability and water saturation; according to the value before and after drilling and completion fluids contaminated water relative permeability to determine the impact of the drilling / completion fluid core, the core after the contamination of water relative permeability larger decline , it is considered that the mudcake drilling / completion fluid is formed having a strong plugging effect, when small drops of oil relative permeability after the contamination, that the drilling / completion fluid having a self-blocking capability.
  2. 2. 如权利要求1所述的钻完井液对岩心油水渗透率影响评价方法,其特征是:步骤(1)-(4)中所述的岩心测定、实验流体配制、建立束缚水饱和度、油水渗透率测定、以及岩心有效孔隙体积、含水饱和度、油水渗透率的计算公式均是依据SY/T 5345-2007"岩石中两相流体相对渗透率测定方法"中相关内容。 2. The drilling and completion fluids according to claim 1 to evaluate the effects on water permeability of the core, wherein: Step (1) - (4) measurement of the core, fluid formulation experiments establish irreducible water saturation , water permeability was measured, and the effective core pore volume, water saturation, water permeability is calculated are based SY / T 5345-2007 "two-phase relative permeability rocks Determination methods" related content.
  3. 3. 如权利要求1或2所述的钻完井液对岩心油水渗透率影响评价方法,其特征是:所述动态岩心流动实验装置采用JHMD- II高温高压岩心动态损害评价系统。 3. The drilling fluid or the completion of claims 1 to evaluate the effects on water permeability of the core, wherein: the core flow test device employs dynamic JHMD- II HTHP dynamic core damage evaluation system.
  4. 4. 如权利要求3所述的钻完井液对岩心油水渗透率影响评价方法,其特征是:所述步骤(2)中测定束缚水饱和度下的油相渗透率、步骤(3)和(4)中测定钻完井液污染前后油水渗透率时的测试温度及步骤(4)中钻完井液污染岩心时的循环温度均为25°C -120°C。 4. The drilling and completion fluids according to claim 3 to evaluate the effects on water permeability of the core, wherein: the determination of the oil permeability bound water saturation, step (2) in the step (3), and (4) Determination of test temperature and the drilling of oil and water permeability steps before and after the completion fluid contamination (4) when the temperature of circulating drilling completion fluid contamination core are 25 ° C -120 ° C.
  5. 5. 如权利要求4所述的钻完井液对岩心油水渗透率影响评价方法,其特征是: 所述步骤⑵中建立束缚水饱和度和测定束缚水状态下的油相渗透率时的环压为1.5MPa-12. 5MPa;步骤(3)、(4)中测定钻完井液污染前后油水渗透率时的测试环压为5-15MPa ;步骤(4)中钻完井液污染岩心时的环压为6-12MPa。 5. The drilling and completion fluids as claimed in claim 4, wherein the impact assessment method of water permeability core, wherein: establishing said ring when bound water and oil saturation state in the determination of irreducible water permeability to the step ⑵ when the step of drilling and completion fluids contaminated core (4); the pressure is 1.5MPa-12 5MPa;. step (3), (4) measured before and after drilling and completion fluids when contaminated water permeability test loop pressure of 5-15MPa cycloalkyl pressure 6-12MPa.
  6. 6. 如权利要求5所述的钻完井液对岩心油水渗透率影响评价方法,其特征是:所述步骤(2)中建立束缚水饱和度时的油驱水驱替流量为0. 1-3. OmL/min,低速驱替流量为0. 1-0. 3mL/min,测定束缚水状态下的油相渗透率时的驱替流量为0. 2-2. OmL/min。 6. The drilling and completion fluids as claimed in claim 5, wherein the impact assessment method of water permeability core, wherein: said establishing step (2) in the oil at irreducible water saturation for water flooding displacement flow 0.1 -3. OmL / min, the flow rate is low displacement 0. 1-0. 3mL / min, the flow rate is measured displacement bound 0. 2-2. OmL / min at an oil phase in the state of water permeability.
  7. 7. 如权利要求6所述的钻完井液对岩心油水渗透率影响评价方法,其特征是:所述步骤(3)、(4)中测定钻完井液污染前后油水渗透率时的油水总流量为0.5-5. OmL/min;三组油水流量比在10:1-1:10之间。 When the water in step (3), (4) measured before and after drilling and completion fluids contaminated water permeability: 7. The drilling and completion fluids according to claim 6 to evaluate the effects on water permeability of the core, wherein the total flow rate of 0.5-5 OmL / min; the flow rate ratio of the three groups 10 water: between 10: 1-1.
  8. 8. 如权利要求7所述的钻完井液对岩心油水渗透率影响评价方法,其特征是:所述步骤(4)中钻完井液污染岩心时的循环时间为2-5h。 8. The drilling and completion fluids according to claim 7 to evaluate the effects on water permeability of the core, wherein: the cycle time of step (4) of the core drilling and completion fluid contamination 2-5h.
  9. 9. 如权利要求8所述的钻完井液对岩心油水渗透率影响评价方法,其特征是:所述步骤(2)、(3)、(4)中岩心装入相对渗透率测定仪的岩心夹持器时可在不超过长度范围时在岩心两端各加一块高渗岩心。 9. The drilling and completion fluids according to claim 8 to evaluate the effects on water permeability of the core, wherein: said step (2), (3), (4) charged in the core relative permeability analyzer It may be not more than the core length at both ends of each of the core when adding a hypertonic core holder.
CN 201410668895 2014-11-21 2014-11-21 Affect one core drilling completion fluid water permeability evaluation method CN105651665B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201410668895 CN105651665B (en) 2014-11-21 2014-11-21 Affect one core drilling completion fluid water permeability evaluation method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201410668895 CN105651665B (en) 2014-11-21 2014-11-21 Affect one core drilling completion fluid water permeability evaluation method

Publications (2)

Publication Number Publication Date
CN105651665A true true CN105651665A (en) 2016-06-08
CN105651665B CN105651665B (en) 2018-10-23

Family

ID=56480174

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201410668895 CN105651665B (en) 2014-11-21 2014-11-21 Affect one core drilling completion fluid water permeability evaluation method

Country Status (1)

Country Link
CN (1) CN105651665B (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030136560A1 (en) * 2002-01-23 2003-07-24 Ali Mese Method for drilling and completing boreholes with electro-rheological fluids
CN2682411Y (en) * 2004-04-02 2005-03-02 中国石油天然气集团公司 High temperature and high pressure core dynamic damage evaluation tester
CN201780251U (en) * 2010-07-26 2011-03-30 长江大学 Dynamic contamination assessing experimental instrument for coal seam core under high-temperature and high-pressure conditions
CN202882901U (en) * 2012-09-28 2013-04-17 中国石油化工股份有限公司 Experimental device for evaluating damage of rock core
CN103528932A (en) * 2013-10-27 2014-01-22 荆州市现代石油科技发展有限公司 Multifunctional radial holder
CN104634924A (en) * 2013-11-07 2015-05-20 中国石油化工集团公司 Temporary plugging agent reservoir protection effect evaluating method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030136560A1 (en) * 2002-01-23 2003-07-24 Ali Mese Method for drilling and completing boreholes with electro-rheological fluids
CN2682411Y (en) * 2004-04-02 2005-03-02 中国石油天然气集团公司 High temperature and high pressure core dynamic damage evaluation tester
CN201780251U (en) * 2010-07-26 2011-03-30 长江大学 Dynamic contamination assessing experimental instrument for coal seam core under high-temperature and high-pressure conditions
CN202882901U (en) * 2012-09-28 2013-04-17 中国石油化工股份有限公司 Experimental device for evaluating damage of rock core
CN103528932A (en) * 2013-10-27 2014-01-22 荆州市现代石油科技发展有限公司 Multifunctional radial holder
CN104634924A (en) * 2013-11-07 2015-05-20 中国石油化工集团公司 Temporary plugging agent reservoir protection effect evaluating method

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
周凤军等: "稳态法测定油水相对渗透率的实用方法", 《石油地质与工程》 *
李蔚萍等: "涠洲油田群强水敏储层钻井完井液伤害分析及解堵技术应用", 《精细石油化工进展》 *
王永恒等: "水平井钻井完井液损害实验评价技术新进展", 《钻井液与完井液》 *

Also Published As

Publication number Publication date Type
CN105651665B (en) 2018-10-23 grant

Similar Documents

Publication Publication Date Title
Oak et al. Three-phase relative permeability of Berea sandstone
Faulkner et al. Comparisons of water and argon permeability in natural clay‐bearing fault gouge under high pressure at 20° C
Roychaudhuri et al. An experimental investigation of spontaneous imbibition in gas shales
Strand et al. New wettability test for chalk based on chromatographic separation of SCN− and SO42−
Geffen et al. Experimental investigation of factors affecting laboratory relative permeability measurements
Sahni et al. Measurement of three phase relative permeability during gravity drainage using CT
Ballard et al. Fundamentals of shale stabilisation: water transport through shales
Webb et al. Low salinity oil recovery–The role of reservoir condition corefloods
Morrow et al. Oil recovery by spontaneous imbibition from weakly water-wet rocks
Gao et al. Estimating permeability using median pore-throat radius obtained from mercury intrusion porosimetry
Amann-Hildenbrand et al. Transport properties of unconventional gas systems
Al Mansoori et al. Measurements of non-wetting phase trapping applied to carbon dioxide storage
Evans et al. The effect of an immobile liquid saturation on the non-Darcy flow coefficient in porous media
US20120152548A1 (en) Method to characterize underground formation
Webb et al. Comparison of high/low salinity water/oil relative permeability
Callahan et al. Using multiple experimental methods to determine fracture/matrix interactions and dispersion of nonreactive solutes in saturated volcanic tuff
Graue et al. Alteration of wettability and wettability heterogeneity
Sang et al. Enhanced oil recovery by branched-preformed particle gel injection in parallel-sandpack models
Alagic et al. Effect of crude oil ageing on low salinity and low salinity surfactant flooding
Chenevert et al. Permeability and effective pore pressure of shales
Cohen et al. Polymer retention and adsorption in the flow of polymer solutions through porous media
Bachu et al. Chromatographic partitioning of impurities contained in a CO2 stream injected into a deep saline aquifer: Part 1. Effects of gas composition and in situ conditions
Manichand et al. Field vs. laboratory polymer-retention values for a polymer flood in the Tambaredjo field
Zhou et al. Interrelationship of wettability, initial water saturation, aging time, and oil recovery by spontaneous imbibition and waterflooding
CN103257151A (en) Method for quantitative evaluation on pore throat usage law in oil and gas secondary migration process

Legal Events

Date Code Title Description
C06 Publication
C10 Entry into substantive examination
GR01