A simple NMR methodology for evaluating filter cake properties and drilling fluid-induced formation damage
Tóm tắt
An efficient drilling fluid will form a filter cake that will minimize the drilling fluid invasion into any drilled formation. Drilling fluid must therefore be adequately evaluated in the laboratory prior to field trial. Filter cake properties such as thickness, porosity, permeability, and pore structure are frequently evaluated using several techniques such as CT scan, SEM, and XRF. However, each of these techniques can evaluate only one or two filter cake properties. This paper presents a simple but novel NMR technique to evaluate filter cake properties such as thickness, pore volume, porosity, and possibly permeability. Furthermore, the amount and particle size distribution of solids that invaded a given rock sample can be obtained using the same technique. The full procedure was tested and verified using four identical rock samples. Drilling fluid invasion and filter cake deposition experiments were conducted on each of the samples, using the same drilling fluid but four different concentrations of fluid loss additive. NMR T2 relaxation measurements were taken at three different stages of each rock sample: before filter cake deposition; after fluid invasion and filter cake deposition; and after filter cake removal. A material balance analysis of the probability density function and cumulative distribution function of the measured T2 profile at the different stages of each sample yielded multiple filtration loss properties of the filter cake. The results obtained showed high accuracy of the NMR versus the current techniques. Moreover, this current method evaluated the majority of the filter cake properties at the same time and in situ hence eliminated the need of using multi-procedures that disturb the sample state. Finally, the presented method can also be used to evaluate secondary damage associated with filter cake removal process.
Tài liệu tham khảo
Al-Yaseri Ahmed Z, Lebedev Maxim, Vogt Sarah J, Johns Michael L, Barifcani Ahmed, Iglauer Stefan (2015) Pore-scale analysis of formation damage in Bentheimer sandstone with in situ NMR and micro-computed tomography experiments. J Petrol Sci Eng 129:48–57. https://doi.org/10.1016/j.petrol.2015.01.018
Amaefule JO, Kersey DG, Norman DL, Shannon PM (1988) Advances in formation damage assessment and control strategies. In: CIM paper no. 88-39-65. Proceedings of the 39th annual technical meeting of petroleum society of CIM and Canadian Gas Processors Association, Calgary, Alberta, 12–16 June 1988
Bageri BS, Al-Mutairi SH, Mahmoud MA (2013) Different techniques for characterizing the filter cake. Soc Pet Eng 1:1. https://doi.org/10.2118/163960-MS
Bennion DB, Thomas FB, Bennion DW (1991) Effective laboratory coreflood tests to evaluate and minimize formation damage in horizontal wells. Presented at the 3rd international conference on horizontal well technology, Nov 1991, Houston, TX
Byrne MT, Spark ISC, Patey ITM, Twynam AJ (2000) A laboratory drilling mud overbalance formation damage study utilising cryogenic SEM techniques. SPE 58738, Presented at the SPE international symposium on formation damage control held in Lafayette, Louisiana, 23–24 Feb 2000
Carr HY, Purcell EM (1954) Effects of diffusion on free precession in nuclear magnetic resonance experiments. Phys Rev 94:630–638. https://doi.org/10.1103/PhysRev.94.630
Civan F (2007) Reservoir formation damage fundamentals, modeling, assessment and mitigation, 2nd edn. Gulf Publishing Company, Houston, p 1114
Civan F (2016) Civan reservoir formation damage, 3rd edn. Elsevier, Oxford
Cohen MH, Mendelson KS (1982) Nuclear magnetic relaxation and the internal geometry of sedimentary rocks. J Appl Phys 53(2):1127. https://doi.org/10.1063/1.330526
Dewan JT, Chenevert ME (2001) A model for filtration of water-base mud during drilling: determination of mudcake parameters. Soc Petrophys Well Log Anal 42(03):237–250
Fischer S, Zemke K, Liebscher A, Wandrey M (2011) Petrophysical and petrochemical effects of long-term CO2-exposure experiments on brine-saturated reservoir sandstone. Energy Procedia 4:4487–4494
Gabriel GA, Inamdar GR (1983) An experimental investigation of fines migration in porous media. SPE-12168. Presented at the SPE annual technical conference and exhibition, San Francisco, California, 5–8 Oct (1983)
Godinho JRA, Chellappah K, Collins I, Ng P, Smith M, Withers PJ (2019) Time-lapse imaging of particle invasion and deposition in porous media using in situ X-ray radiography. J Petrol Sci Eng 177:384–391. https://doi.org/10.1016/j.petrol.2019.02.061
Green J, Cameron R, Patey I, Nagassar V, Quine M (2013) Use of micro-CT scanning visualisations to improve interpretation of formation damage laboratory tests including a case study from the South Morecambe field. SPE 165110, Presented at the SPE European formation damage conference, Noordwijk, The Netherlands, 5–7 June 2013
Josh M, Esteban L, Delle Piane C, Sarout J, Dewhurst DN, Clennell MB (2012) Laboratory characterisation of shale properties. J Petrol Sci Eng 88–89:107–124. https://doi.org/10.1016/j.petrol.2012.01.023
Kandarpa V, Sparrow JT (1981) A useful technique to study particle invasion in porous media by backscattered electron imaging. SPE 10134, Presented at the SPE 56th annual fall technical conference and exhibition, San Antonio, Texas, Oct 5–7, 1981
Krilov Z, Steiner I, Goricnik B, Wojtanowicz AJ, Cabrajac S (1991) Quantitative determination of solids invasion and formation damage using CAT scan and barite suspensions. SPE 23102, Presented at the SPE Offshore Europe Conference, UK, Aberdeen, 3–6 Sept 1991
Meiboom S, Gill D (1958) Modified spin-echo method for measuring nuclear relaxation times. Rev Sci Instrum 29:688–691. https://doi.org/10.1063/1.1716296
Offenbacher M, Luyster M, Gray L, He W, Leonard R, Stephens M (2013) Return permeability: when a single number can lead you astray in fluid selection. SPE-165106, Presented at the SPE European formation damage conference, Noordwijk, The Netherlands, 5–7 June 2013
Seright RS, Prodanovic M (2006) Lindquist WB X-ray computed microtomography studies of fluid partitioning in drainage and imbibition before and after gel placement: disproportionate permeability reduction. Soc Pet Eng J 11(2):159–170. https://doi.org/10.2118/89393-PA
Straley C, Rossini D, Vinegar HJM, Tutunjian PN, Morriss CE (1997) SCA paper 9494, Society of Core Analysts (1995), or The Log Analyst, 38, p 84
Tran TV, Civan F, Robb ID (2010) Effect of permeability impairment by suspended particles on invasion of drilling fluids. IADC/SPE 133724, Presented at the IADC/SPE Asia Pacific drilling technology conference and exhibition, Vietnam, Ho Chi Minh, 1–3 Nov 2010