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首页> 外文会议>Offshore Technology Conference;ExxonMobil;Aseeder;Schlumberger >Numerical Simulation of Water and Sand Blowout When Drilling through Shallow Water Flow Sediments during Deepwater Drilling
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Numerical Simulation of Water and Sand Blowout When Drilling through Shallow Water Flow Sediments during Deepwater Drilling

机译：深水钻井过程中浅水沉积物钻井时水沙飞散的数值模拟

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A geological model of typical shallow water flow (SWF) sediment in deepwater basins is constructed basedrnon its basic characteristics, and a reservoir simulation model is then established that incorporates two-phasernflow as the basis for the simulation of water and sand blowout process during penetrating SWF formations.rnThe model assumes that sands can start flowing along with water at a critical pressure difference whenrndrilling through SWF formations. The cumulative water and sand blowout as SWF formations are penetratedrnare calculated and the influencing factors, such as SWF zone size, overpressure factor of SWF formationsrnand penetration rate, are incorporated into the model to quantitatively analyze their impacts on the waterrnand sand blowout from SWF zones. The data are useful for the assessment of the severity of SWF hazards.rnThe results show that the cumulative water blowout and sand blowout will be as high as 100m3 and 1m3,rnrespectively, when a typical SWF sediment is totally penetrated. SWF formation overpressure factor has arnremarkable effect on SWF blowout, while SWF zone size has more moderate effects. However, the effectsrnof SWF sediment size are expected to become increasingly significant as time proceeds. 10% increase ofrnoverpressure factor of SWF formation will result in around 90% increase of cumulative water blowout andrn150% increase of cumulative sand blowout after the SWF zone is totally penetrated, while 10% increasernof SWF zone size will lead to about 20% elevation of cumulative water blowout and 25% ascending ofrncumulative sand blowout. The water and sand blowout can be effectively reduced while increasing thernpenetration rate, which indicates that elevating the penetration rate can be a useful measure for the controlrnof SWF hazards during deepwater drilling operations.
机译：根据其基本特征，建立了深水盆地典型浅水流沉积物的地质模型，然后建立了以两相流为基础的油藏模拟模型，作为贯穿SWF过程中水沙喷出过程模拟的基础。该模型假设，当钻穿SWF地层时，砂子可以在临界压力差下与水一起流动。计算了SWF地层渗透时的累积水和沙喷出量，并将影响因素（例如SWF区域大小，SWF地层的超压因数和渗透率）纳入模型，以定量分析它们对SWF地带的水和沙喷出的影响。这些数据可用于评估SWF危害的严重性。结果表明，当典型的SWF沉积物完全渗入时，累积的喷水量和喷砂量分别高达100m3和1m3。 SWF地层超压因子对SWF井喷有明显的影响，而SWF区域大小则有中等程度的影响。但是，随着时间的流逝，SWF沉积物尺寸的影响预计将变得越来越重要。 SWF地层超压因子增加10％将导致累计注水量增加约90％，SWF区域完全渗透后将增加150％的累积喷砂量，而SWF区大小增加10％将导致累积的注水量增加约20％喷水和25％的累积沙尘上升。在增加透水率的同时，可以有效地减少水和沙的喷出，这表明提高渗透率可以作为深水钻井作业中控制SWF危害的有用措施。

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