【作者】 侯俊琳；

【导师】 沈照理；

【作者基本信息】 中国地质大学（北京） ， 地下水科学与工程， 2013， 博士

【摘要】 根据以往地热勘查成果显示，呼和坳陷盆地内热储层有四类：大青山山前断裂带热储层、深部太古—元古界大理岩热储层、侏罗—白垩系砂砾岩热储层、新近系热储层。已被地热井勘探证实的有：HR1井（1999年完井）揭露的主要热储层为元古界与侏罗—白垩系；HR2井（2007年完井）揭露的主要热储层为白垩系与太古界。上述两井的热储层底界埋藏深度达3000m，其成井深度均超过3000m，施工成本及难度都较大。本文所论述的哈素海HR3地热井于2009—2010年施工完井，孔深3368.95m。根据之前的HR1、 HR2两眼地热井勘查经验，认为深部太古界、元古界大理岩与中生界砂砾岩热储性能较好，因此该井设计阶段的首选热储层也是深部大理岩以及侏罗系、白垩系，备选热储层是新近系地层。而HR3井实际钻遇的中生界及以下层位是侏罗系、白垩系与太古界花岗岩，其中侏罗系砂砾岩有含水层。但成井后进行抽水试验发现，出水量太小（40分钟抽出15.72m~3水，降深达315m而吊泵），此时采用了灵活的方针，放弃了侏罗系岩段热储层。从地温条件及含水层条件来考虑，新近系含水层相对较好，因而选择了上部的新近系中新统、上新统作为热储层。热储层层位在1376～1856m之间，有效厚度为37.6m，有效热储层温度43-58℃，地温梯度为3.07-3.23℃/100m，地热成因主要为正常地热增温。通过对热储层进行射孔与管外止水，然后做抽水试验，其涌水量为641.76m~3/d，降深209.14m，出水温度53℃,属于温热水。热水矿化度3.952g/l，水化学类型为CI-Na型。可命名为氯化钠型含溴、碘、硼的硅型温热医疗矿水。同时，HR3地热井热水中还检测出F、Sr、Li、Ba、Fe、Zn、Se、Co、V、Mo、Mn、Ni、Cu等多种对人体有益的微量元素，可直接用于医疗、洗浴等。利用热储法对研究区的地热资源量进行了评价，工作区可利用的地热资源量为5.5692×1010kw·h，按100年利用期计算，则可提供热能大约为63.58MW，相当于802万吨东胜煤田不粘煤（25×106J/kg）完全燃烧的热量，属大型中低温地热田。HR3地热井首次把新近系作为热储层，新近系热储层深度﹤2000m，从成井深度方面分析，属于开采经济型的地热资源，比以往节省了大量的施工成本。HR3地热井为地区地热资源勘查起到了示范作用。更多还原

【Abstract】 According to the previous geothermal exploration results, there are four types ofgeotherrnal reservoir in Huhe Depression Basin,ircluding,Mount Daqing piedmont faultzone reservoir, the deep Pacific-Proterozoic marble reservoir, the Jurassic Cretaceousglutenite reservoir and the Neogene reservoir. well HR1(completed in1999) The maingeotherrnal reservoir exposed is Proterozoic and the Jurassic cretaceous stratum.HR2well (completed in1999)main heat reservoir exposed is Cretaceous and the Archaeozoicstratum.The two wells in the reservoir bottom boundary depth is up to3000m. The welldepth is more than3000m and, construction is cost and difficult. Hasuhai HR3geothermal well was completed in2009-2010.The depth of the borehole is3368.95m.According to HR1, HR2geothermal exploration experience,deep Archean,Proterozoic and Mesozoic glutenite reservoir of marble have good heat storage properties.Therefore, preferred thermal reservoir in the well design stage is deep marble andJurassic, cretaceous.Alternative heat reservoir is Neogene strata. HR3well drilled in theactual and below strata is the Jurassic, Cretaceous,the Archaeozoic granite, the Jurassicsandstone and conglomerate is aquifer. But well pumping test confirmed that water yieldis too small(Drawdown315m,water yield15.72m~3in440minutes). Using a flexibleapproach, we abandoned the Jurassic rock section of the heat reservoir. From theperspective of aquifer conditions and temperature conditions, Neogene aquifer isrelatively good. We select the upper Neogene Miocene, Pliocene as a heat reservoir. Theheat reservoir stratais is in the depth of1376-1856m. Effective thickness is37.6m;Effective heat reservoir temperature is43-58℃. The geothermal gradient is3.07-3.23℃/100m. The geothermal origin mainly is normal geothermal. Based on the heat reservoirperforating and tube sealing, pumping test is done. Water inflow was641.76m~3/d,drawdown209.14m, water temperature being53℃, belonged to warm water. The degreeof mineralization is3.952g/L. Water chemistry type is Cl-Na type. The water is namedsodium chloride neutral bromine, iodine, boron silicon thermal medical mineral water.HR3geothermal hot water was also detected in trace elements,such as F, Sr, Li, Ba, Fe,Zn, Se, Co, V, Mo, Mn, Ni, Cu and many kinds of elements beneficial to human health.It proper to be used directly for medical, and bathing.Using volumetric method,the geothermal resource in the study area is evaluated, and the amount of geothermalresources available in working area is5.5692×1010kw·h.According to the calculation ofusing the geothermal for100years, it can provide heat for about63.58MW, equivalent to8,020,000tons of Dongsheng coalfield non-caking coal (25×106J/kg) completecombustion heat and it is a large low temperature geothermal field. geothermal wellsHR3is the first one striking the Neogene geothermal reservoir for the first time.Neogenegeo thermal reservoir depth is less than2000m. Based on the analysis of well depth, itbelongs to the mining economic type geothermal resources, saving the construction costmuch than ever. HR3geothermal well as geothermal resources exploration has played anexemplary role.更多还原