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359 Tuyen tap cdng trinh Hdi nghi Cffhgc todn qudc Ky niem 30 ndm Vien Cff hge vd 30 nam Tgp chi Cff hoc Hd Ndi, ngiiy 8 9/4/2009 Su'''' dung mang than kinh nhan tao clio bai toan toi uu phan bo luu luon[.]
359 Tuyen tap cdng trinh Hdi nghi Cffhgc todn qudc Ky niem 30 ndm Vien Cff hge vd 30 nam Tgp chi Cff hoc Hd Ndi, ngiiy 8-9/4/2009 Su' dung mang than kinh nhan tao clio bai toan toi uu phan bo luu luong cac gieng bom ep nuoc va khai thac dau Nguyen The D u e , P h a n Ngoc Trung Viin Ddu Viet Nam Tom tat: Hieu qud ciia phicang phdp khai thdc ddu bdng bam ep nude nhdm tri dp sudt phu thude nhieu vdo viec dieu chinh lini liegng cdc gieng bo'm ep vd cdc gieng khai thdc ddu Bdo cdo trinh bdy nguyen ly dp dung mgng thdn kinh nhdn tgo (Artificigl Neural Network-ANN) kit hgp vdi cdng cu md phdng via cho bdi todn tdi icii heu lugng cdc gieng bom ep nicdc de tri dp sudt via cho phep khai thdc ddu.vdi ngap nicdcthdp nhdt cd the Kit qud thic nghiem cua phuang phdp cho mgt md vi du dicgc trinh bdy Nhicng leu diim vd nhicgc diem ciia phicang phdp sic dung mgng thdn kinh nhdn tgo cung dugc phdn tich dua tren ca sd ly thuyet vd kit qud thic nghiem D a t v a n de Phuong phap khai thac dau bang bom ep nude nham tri ap suat dugc ap dimg rdng rai tren the gidi Phuong phap eung dang dugc sir dung nhu la ky thuat khai thac chii dao eho md dau eiia Viet Nam Hieu qua eiia ky thuat ro rang phu thuoc vao viec dieu chinh luu lugng cac gieng khai thac va bom ep hgp ly Ddi vdi mdi md (via) dau khai thac deu dupe xay dirng md hinh md phdng dua tren dd cae phuong an phuong an khai thac dau va eae phuong an bom ep (neu cd) dupe tinh toan va xem xet Cach lam thdng thirdng la thir nghiem cae luu lugng gieng khac cho dat dugc muc tieu: giam lugng nude bom ep, tang lugng dau khai thac hay giam mire dp ngap nude Tuy nhien, each lam 'thir va phat hien ldi' ('trial and error') khd ed the tiem can den phuong an thuc su tdi uu theo nghTa nao dd vi sd phuong an ed the tao nen tir to hgp thay doi luu lugng cac giing la vd ciing Idn, dac biet la ddi vdi nhung md ed nhieu gieng bom ep va khai thac Mot vi du don gian la vdi mdt md cd 20 gieng, neu mdi gieng ta chi cho luu lugng thay doi mpt gia trj thi so phuong an cd the tao dugc da la tire xap xi mdt trieu Nhugc diim cua each lani 'thu va phat hien ldi' da thue day sir phat trien cua nhung nghien CUU ' su dung cac phirong phap toan hoc bai toan tdi uu phan bd luu lugng gieng bom ep va khai thac Cach lam thdng thudng nhat la sir dung cac thuat toan tdi uu boa true tilp eho ham xac dinh qua md hinh md phdng md Ban chat eiia each lam la lua ehpn mdt mue tieu phii hgp (vi du lugng diu thu dugc hay dp ngap nude san pham) va eae bien dieu khien (luu lugng chit luu cac giing hoac luu lugng diu giing khai thac va luu lugng nude giing bom ep) va giai bai toan tim circ trj cua ham muc tieu: Q = Q(X):X&^» ^ > v s V •^ 100.0 95.0 365 438 511 584 Thoi gian (ngay) 657 ^ •V 730 Che toi uu hoa Che tham khao Hinh Biin thien tdng luu lugng dau khai thac theo thdi gian tuong irng vdi che dd tdi uu hda va che dd tham khao Nguyin Thi Dire, Phan Nggc Trung 368 14,0 511 584 730 Thoi gian (ngay) ''• -Clie toi uu Che tham khao i Hinh Bien thien tong luu lugng nude san pham theo thdi gian tuong irng vdi che tdi uu hda va che dp quy chieu So sanh phuong phap sii' dung ANN voi p h u o n g phap sir dung cac thuat toan toi uu true tiep Ket qua thir nghiem md ta tren eho thay hieu qua eua phuong phap su' dung ANN Ban chat eua phuong phap sir dung ANN la khdng thuc hien ap dung cac thuat toan tdi uu boa trirc tiep len ham Q = Q\X] xac djnh bdimd hinh via phuong trinh (1) ma xay dung mpt mang than kinh nhan tao dupe huan luyen de nhan eae tin hieu vao X - {X^,X2, ,X„)' (luu lupng gieng) va cho tin hieu Q (miic dp ngap nude) Tham khao tai lieu [6], phuong phap true tilp vdi thuat toan toi uu hda khac duge ap dung ebo cimg mdt bai toan vdi ciing mpt sd lan gpi ham cho thay phuong phap sir dung ANN cho hieu qua tuong duong: cu thi la gia trj ham tdi uu bing 6.29% nhan dupe vdi phuong phap sir dung ANN nim khoang 5.31%) tdi 10.78% tiiy theo phirong phap toi uu true tilp khac So sanh dinh lugng ndi tren cho thiy phuong phap sir dung ANN CO the dimg viec giai quyet cae bai toan toi uu luu lugng bom ep va khai thac thay the cho cae phuong phap toi uu true tilp Mae dii tdc thu nhd ham muc tieu sii dung ANN CO ve chain hon mdt mpt ehiit so vdi vai phuang phap tdi uu trirc tilp, nhung co thi thay 6uac: Sir dung ANN thich hgp hon trudng hgp cd qua nhieu dilu kien ap dat len luu lupng lam viec eiia eae giing lam eho miln xac djnh cua ham (1) khong lien tuc va do eo the lam mdt si phirong phap toi uu true tilp khong hpi tu Trong thue te ludn luon xuat hien nhung dilu kien ap dat mdi eho chi dp lam viec gieng lam ldi giai tdi uu cu khong cdn thich hgp Trong trudng hgp do, cd thi nhanh chdng sir dung ANN da CO de nhan dupe Idi giai mdi phai lam lai tii' diu nlu sir dung true tilp cae thuat toan toi uu Sie dung mgng thdn kinh nhdn tgo cho bdi todn tdi mi phdn bd heu lugng cdc giing bom ep nude vd khai thdc ddu 369 Ket luan Mdt h u d n g giai quyet bai toan tdi uu phan bd luu lugng gieng bom ep va gieng khai thac sir diing A N N ket hgp vdi cdng cu md phdng via da dugc nghien ciru Thir nghiem phuong phap cho mdt via vi du cho thay h u d n g sir dung ANN nhan dupe nhiing k i t qua tuong duong vdi viec sir dung true tiep cae thuat toan tdi uu Trong dd, nguyen ly eiia phuong phap sir dung ANN lam cho nd de dang hon viec dap irng eae dieu kien thue te phire tap Ket qua nghien ciru budc dau eho thay kha nang sir dung ANN vao thuc t l tinh toan thiit k l khai thac md d i u Loi cam on Cong trinh dugc hoan vdi su tai trg ciia Quy phat trien khoa hpc va cdng nghe qudc gia T a i lieu t h a m k h a o [I] Asheim, H (1988) "Maximization of Water Sweep Efficiency by Controlling Production and Injection Rates'' SPE paper 18365, Society of Petroleum Engineers [2] Virnovsky, G A (1991) "Water Flooding Stratery Design Using Optimal Control Theory", Proceeding of the 6-th European Symposium on Improved Oil Recovery, Stavanger, Norway, pp 437-446 [3] Sudaryanto, B.; Yortos, Y C (2000) "Optimization of Fluid Front Dynamics in Porous Media using Rate Control Equal Mobility Fluids" Physics of Fluid, Vol 12, pp 1656-1670 [4] Sudaryanto, B., Yortos, Y C (2001) "Optimization of Displacement in Porous Media Using Rates Control" SPE paper 71509, Society of Petroleum Engineers [5] Dolle, N ,Brouwer; D.R and Jansen, J.D (2002) "Dynamic Optimization of Water Flooding with Multiple Injectors and Producers using Optimal Control Theory" 16th International Conference on Computational Methods in Water Resoiirse, Delft, 2002 [6] Nguyin Thi Dire, Duong Ngoc Hai, Nguyin Minh Toan, Nguyen Van IJt (2007) "Danh gia hieu qua ciia mot s6 thuat toan tii uu truySn thing cho bai toan toi uu phan bo luu lirgng bom ep nuoc va khai thac diu'' Tuyin tap cdng trinh Hdi nghi khoa hoc Ca hoc Thiiy todn quoc ndm 2007, Hue, 26-28/7/2007, pp 111-125 [7] Nguyin Thi Dire, Duong, Ngoc Hai, Nguyin Minh Toan, Hoang Van Quy (2008) "Ap dung thuat toan tii uu xac dinh luu lugng ho'p ly cac giing khai thac va bam ep" Tuyin tap bdo cdo Hdi nghi KHCN "Viin Dau Viet Nam: 30 ndm hdi nhap vd phdt triin", NXB Klioa hoc va Ky thuat, HaNoi, 2008, pp 844-849 [8] Aminzadeh, F.-(2005) "Applicadons of AI and soft computing for challenging problems in the oil industry" Journal of Petroleum Science and Engineering, Vol 47, 2005, pp - [9] Lim J S (2005) "Reservoir properties determination using fuzzy logic and neural networks from well data in offshore Korea" Journal of Petroleum Science and Engineering, Vol 49, pp 182- 192 [10] Aminian K.; Ameri S (2005) "Application of artificial neural networks for reservoir characterization with limited data" Journal of Petroleum Science and Engineering, Vol 49, pp 212-222 [II] Nikravesh M et al (1996), "Neural Networks for Field-Wise Waterflood Management in Low Permeability Fractured Oil Reservoir" SPE 35721 [12] Mohaghegh S.'D (2005), "A new methodology for identification of best practices in the oil gas industry, using intelligent system" Journal of Petroleum Science and Engineering, Vol 49, pp 239260 ... dung nhilu nhit hien Sie dung mgng thdn kinh nhdn tgo cho bdi todn tdi iiv phdn bo lim lugng cdc giing bom ep medc vd khai thdc ddu 361 2.1 Miing thdn kinh nhdn tiio ddn xuoi Dau vao Dau vao... chat luu khai thac khdng doi cho toan md, viec giam iniie dp ngap nude ddng nghTa vdi viec tang lugng dau khai thac Cac Hinh va Hinh eho thiy bilu dd theo thdi gian eiia tdng luu lugng dau khai thac... thdn kinh nhdn tgo cho bdi todn tdi mi phdn bd heu lugng cdc giing bom ep nude vd khai thdc ddu 369 Ket luan Mdt h u d n g giai quyet bai toan tdi uu phan bd luu lugng gieng bom ep va gieng khai