| 2 | Integrated modeling of fracturing-flowback-production dynamics and calibration on field data:Optimum well startup scenarios显示文摘We aim at the development of a general modelling workflow for design and optimization of the well flowback and startup operation on hydraulically fractured wells.Fracture flowback model developed earlier by the authors is extended to take into account several new fluid mechanics factors accompanying flowback,namely,viscoplastic rheology of unbroken cross-linked gel and coupled“fracture-reservoir”numerical submodel for influx from rock formation.We also developed models and implemented new geomechanical factors,namely,(i)fracture closure in gaps between proppant pillars and in proppant-free cavity in the vicinity of the well taking into account formation creep;(ii)propagation of plastic deformations due to tensile rock failure from the fracture face into the fluid-saturated reservoir.We carried out parametric calculations to study the dynamics of fracture conductivity during flowback and its effect on well production for the set of parameters typical of oil wells in Achimov formation of Western Siberia,Russia.The first set of calculations is carried out using the flowback model in the reservoir linear flow regime.It is obtained that the typical length of hydraulic fracture zone,in which tensile rock failure at the fracture walls occurs,is insignificant.In the range of rock permeability in between 0.01 mD and 1 D,we studied the effect of non-dimensional governing parameters as well as bottomhole pressure drop dynamics on oil production.We obtained a map of pressure drop regimes(fast,moderate or slow)leading to maximum cumulative oil production.The second set of parametric calculations is carried out using integrated well production modelling workflow,in which the flowback model acts as a missing link in between hydraulic fracturing and reservoir commercial simulators.We evaluated quantitatively effects of initial fracture aperture,proppant diameter,yield stress of fracturing fluid,pressure drop rate and proppant material type(ceramic and sand)on long-term well production beyond formation linear regime.The third set of parametric calculations is carried out using the flowback model history-matched to field data related to production of four multistage hydraulically fractured oil wells in Achimov formation of Western Siberia,Russia.On the basis of the matched model we evaluated geomechanics effects on fracture conductivity degradation.We also performed sensitivity analysis in the framework of the history-matched model to study the impact of geomechanics and fluid rheology parameters on flowback efficiency. | S.A.Boronin K.I.Tolmacheva I.A.Garagash I.R.Abdrakhmanov G.Yu Fisher A.L.Vainshtein P.K.Kabanova E.V.Shel G.V.Paderin A.A.Osiptsov | 2023 | Petroleum Science2023，20，4： | 1 |
| 8 | 声波成像测井仪的模拟模型显示文摘井眼成像技术是石油工业中发展最为迅速的先进技术之一。井眼成像技术中的一些最重要的应用是现代的油藏工程,提高了油气采收率,加深了对低渗油藏增产和深探井的地质研究。西方阿特拉斯测井公司已把看来相互独立的两种普通成像测井仪(微电阻率和声波)合并为一种井下仪器。为了定量解释成像测井资料,同时验证数值模拟的结果,建立了一个井眼老石模型,用于研究成像测井仪对已知地质特征的响应。本文给出了声波成像测井仪模拟模型的结果。一套用于电阻率成像仪和声波成像仪的模型装置已建起来。设计用该装置测量传感器对微小或复杂地质特征的响应,如孔洞、裂缝、倾斜断块、薄层和泥饼等。这些复杂的地质特征很难用普通的数值模拟模型进行模拟。用装有成像仪中声波成像部分的旋转平台进行声波成像模拟。模拟模型结果表征了仪器对地质特征的响应,并可用于发展成像资料的定量解释软件。这些结论也有助于独立地核实数值模拟。 | G.Yu M.Civarolo 于飞 韩秀敏 | 1998 | 国外测井技术1998，13，5： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员